Modding (from "modifying") is the act of modifying hardware, software, or anything else to perform a function not originally intended by the
designer
A designer is a person who plans the form or structure of something before it is made, by preparing drawings or plans. In practice, anyone who creates tangible or intangible objects, products, processes, laws, games, graphics, services, or exper ...
, or to achieve
bespoke
''Bespoke'' () describes anything commissioned to a particular specification, altered or tailored to the customs, tastes, or usage of an individual purchaser. In contemporary usage, ''bespoke'' has become a general marketing and branding concep ...
specification or appearance. The term is often used in reference to
video game modding
Video game modding (short for "modifying") is the process of alteration by players or fans of one or more aspects of a video game, such as how it looks or behaves, and is a sub-discipline of general ''modding''. A set of modifications, commonly c ...
, particularly in regard to creating new or altered content and sharing that via the web. It may be applied to the
overclocking
In computing, overclocking is the practice of increasing the clock rate of a computer to exceed that certified by the manufacturer. Commonly, operating voltage is also increased to maintain a component's operational stability at accelerated sp ...
of computers in order to increase the
frequency
Frequency is the number of occurrences of a repeating event per unit of time. Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio ...
at which the
CPU operates.
Case modding
Case modification, commonly referred to as case modding, is the modification of a computer case or a video game console chassis. Modifying a computer case in any non-standard way is considered a case mod. Modding is done, particularly by Compute ...
is a popular activity amongst many computer enthusiasts which involves the customization of a
computer case
A computer case, also known as a computer chassis, is the enclosure that contains most of the hardware of a personal computer. The components housed inside the case (such as the CPU, motherboard, memory, mass storage devices, power supply unit ...
or the installation of
water cooling
file:KKP Auslauf.jpg, Cooling tower and water discharge of a nuclear power plant
Water cooling is a method of heat removal from components and industrial equipment. Evaporative cooling using water is often more efficient than air cooling. Water i ...
technology. In connection with
automobiles
A car, or an automobile, is a motor vehicle with wheels. Most definitions of cars state that they run primarily on roads, Car seat, seat one to eight people, have four wheels, and mainly transport private transport#Personal transport, peopl ...
, modding can connote
engine tuning
Engine tuning is the adjustment or modification of the internal combustion engine or Engine Control Unit (ECU) to yield optimal performance and increase the engine's power output, economy, or durability. These goals may be mutually exclusive; ...
, remapping of a vehicle's
engine control unit
An engine control unit (ECU), also called an engine control module (ECM), is a device that controls various subsystems of an internal combustion engine. Systems commonly controlled by an ECU include the fuel injection and ignition systems.
The ...
or customization of the
coachwork
A coachbuilder manufactures bodies for passenger-carrying vehicles.
The trade of producing coachwork began with bodies for horse-drawn vehicles. Today it includes custom automobiles, buses, motor coaches, and railway carriages.
The word ...
.
Computers and digital equipment
Legal issues
Modding may sometimes infringe the legal rights of the copyright owner. Some nations have laws prohibiting modding and accuse modders of attempting to overcome
copy protection
Copy protection, also known as content protection, copy prevention and copy restriction, is any measure to enforce copyright by preventing the reproduction of software, films, music, and other media.
Copy protection is most commonly found on vid ...
schemes. In the United States, the
DMCA
The Digital Millennium Copyright Act (DMCA) is a 1998 United States copyright law that implements two 1996 treaties of the World Intellectual Property Organization (WIPO). It criminalizes production and dissemination of technology, devices, or ...
has set up stiff penalties for mods that violate the rights of intellectual property owners. In the
European Union
The European Union (EU) is a supranational union, supranational political union, political and economic union of Member state of the European Union, member states that are Geography of the European Union, located primarily in Europe. The u ...
, member states have agreed the
EU Copyright Directive and are transposing it into national law. A 22-year-old man was convicted by
Caerphilly
Caerphilly (, ; , ) is a town and community (Wales), community in Wales. It is situated at the southern end of the Rhymney Valley and separated from the Cardiff suburbs of Lisvane and Rhiwbina by Caerphilly Mountain.
It is north of Cardiff an ...
Magistrates' Court in the
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
in July 2005 for selling a modded
Xbox
Xbox is a video gaming brand that consists of four main home video game console lines, as well as application software, applications (games), the streaming media, streaming service Xbox Cloud Gaming, and online services such as the Xbox networ ...
with built in software and games. However it is also worthy of note that some other European countries have not interpreted the legal issues in the same way. In Italy a judge threw out a
Sony
is a Japanese multinational conglomerate (company), conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (i ...
case saying it was up to owners of a console what they did with it. Similarly in Spain, mod chips have been ruled as legal despite the EU copyright legislation. Modding may be an unauthorized change made to a software or hardware to a platform in gaming. Case mods are modifications to a device with the altering of certain styles. For example, people who mod a
Microsoft
Microsoft Corporation is an American multinational corporation and technology company, technology conglomerate headquartered in Redmond, Washington. Founded in 1975, the company became influential in the History of personal computers#The ear ...
Xbox 360
The Xbox 360 is a home video game console developed by Microsoft. As the successor to the Xbox (console), original Xbox, it is the second console in the Xbox#Consoles, Xbox series. It was officially unveiled on MTV on May 12, 2005, with detail ...
can alter the
LED
A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresp ...
lights on the controller to glow different colors.
On August 5, 2009, Matthew Crippen, a 27-year-old student at
California State University, Fullerton
California State University, Fullerton (CSUF or Cal State Fullerton) is a public research university in Fullerton, California, United States. With a total enrollment of more than 41,000, it has the largest student body of the California State ...
, was arrested for modifying game consoles including the Xbox 360, PlayStation 3, and Nintendo Wii for profit. Crippen testified that it was so owners could play their backup discs of DRM-laden gaming software that they legally own. However, the DMCA states that it is illegal to circumvent copyright protection software, even for non-infringing uses such as backing up legally owned games. In December 2010 the prosecutors dropped all charges against Crippen because of inadmissible evidence obtained through an audio-less video recording deemed illegal by California law.
Video game consoles

A common example of one kind of modding is
video game console
A video game console is an electronic device that Input/output, outputs a video signal or image to display a video game that can typically be played with a game controller. These may be home video game console, home consoles, which are generally ...
mod chips, which can allow users to play
homemade games, games legitimately purchased in other
regions
In geography, regions, otherwise referred to as areas, zones, lands or territories, are portions of the Earth's surface that are broadly divided by physical characteristics (physical geography), human impact characteristics (human geography), and ...
, or legal backup copies, but can also allow
illegal unauthorized copies by allowing the player to play personally
recorded CD or
DVD
The DVD (common abbreviation for digital video disc or digital versatile disc) is a digital optical disc data storage format. It was invented and developed in 1995 and first released on November 1, 1996, in Japan. The medium can store any ki ...
copies of
video game
A video game or computer game is an electronic game that involves interaction with a user interface or input device (such as a joystick, game controller, controller, computer keyboard, keyboard, or motion sensing device) to generate visual fe ...
s.
Modchips
A modchip (short for modification chip) is a small electronic device used to alter or disable artificial restrictions of computers or entertainment devices. Modchips are mainly used in video game consoles, but also in some DVD player, DVD or Blu- ...
, in their current form, were first available for the Sony
PlayStation
is a video gaming brand owned and produced by Sony Interactive Entertainment (SIE), a division of Japanese conglomerate Sony. Its flagship products consists of a series of home video game consoles produced under the brand; it also consists ...
(and later the
PlayStation 2
The PlayStation 2 (PS2) is a home video game console developed and marketed by Sony Interactive Entertainment, Sony Computer Entertainment. It was first released in Japan on 4 March 2000, in North America on 26 October, in Europe on 24 Novembe ...
). Various other types of copyright circumvention systems also existed for the
Nintendo 64
The (N64) is a home video game console developed and marketed by Nintendo. It was released in Japan on June 23, 1996, in North America on September 29, 1996, and in Europe and Australia on March 1, 1997. As the successor to the Super Nintendo E ...
and the older Game Boy consoles (though neither include actual modding, but instead backup devices).
Types of modding
There are two different ways of running unsigned code on a game console. One is through
soft modding (modifying software, normally using a
softmod
A softmod (short for software modification) is a method of using software to modify the intended behavior of hardware, such as computer hardware, or video game consoles in a way that can overcome restrictions of the firmware, or install custom f ...
) to allow the user to change data contained on its
hard drive
A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating hard disk drive platter, pla ...
in the case of the Xbox. Another type of modding, known as
hard modding, is done by modifying the hardware, such as components connected to the
Hypervisor
A hypervisor, also known as a virtual machine monitor (VMM) or virtualizer, is a type of computer software, firmware or hardware that creates and runs virtual machines. A computer on which a hypervisor runs one or more virtual machines is called ...
in order to run exploits to the
BIOS
In computing, BIOS (, ; Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is a type of firmware used to provide runtime services for operating systems and programs and to perform hardware initialization d ...
of the console or to run unsigned code and games. This form of 'modding' (more correctly termed as
hacking), while not as popular as softmodding, is mostly done as it is able to 'run' many different types of software. Soft modding is more popular because of its ease of installation and its relatively low price (it can even be done for free with the right tools).
Another type of console modding is about appearances, much like computer case modification. Which includes, adding lights (most likely
LEDS,
cathode
A cathode is the electrode from which a conventional current leaves a polarized electrical device such as a lead-acid battery. This definition can be recalled by using the mnemonic ''CCD'' for ''Cathode Current Departs''. Conventional curren ...
s or other electro-luminescent lighting). Cutting the game system case, to fit hardware and/or expose the internal systems. Cooling is a large part of console hard 'modding', including: heat sink upgrades, more powerful or quieter fans, some even go so far as to abandon common heat exchange to air all together by liquid cooling a console (most notably in the
Xbox 360
The Xbox 360 is a home video game console developed by Microsoft. As the successor to the Xbox (console), original Xbox, it is the second console in the Xbox#Consoles, Xbox series. It was officially unveiled on MTV on May 12, 2005, with detail ...
, which initially had some heat problems).
Game software
On the other side, some companies actively encourage modding of their products. In cases such as
TiVo
TiVo ( ) is a digital video recorder (DVR) developed and marketed by Xperi (previously by TiVo Corporation and TiVo Inc.) and introduced in 1999. TiVo provides an on-screen guide of scheduled broadcast programming television programs, whose fea ...
and
Google
Google LLC (, ) is an American multinational corporation and technology company focusing on online advertising, search engine technology, cloud computing, computer software, quantum computing, e-commerce, consumer electronics, and artificial ...
, there has been an informal agreement between the modders and the company in which the modders agree not to do anything that destroys the company's business model and the company agrees to support the modding community by providing technical specifications and information. Some commercial
video game
A video game or computer game is an electronic game that involves interaction with a user interface or input device (such as a joystick, game controller, controller, computer keyboard, keyboard, or motion sensing device) to generate visual fe ...
s thrive through a
modding
Modding (from "modifying") is the act of modifying hardware, software, or anything else to perform a function not originally intended by the designer, or to achieve bespoke specification or appearance. The term is often used in reference to vid ...
community. In the case of ''
Half-Life Half-life is a mathematical and scientific description of exponential or gradual decay.
Half-life, half life or halflife may also refer to:
Film
* Half-Life (film), ''Half-Life'' (film), a 2008 independent film by Jennifer Phang
* ''Half Life: ...
'' and ''
Warcraft III
''Warcraft III: Reign of Chaos'' is a high fantasy real-time strategy computer video game developed and published by Blizzard Entertainment released in July 2002. It is the second sequel to '' Warcraft: Orcs & Humans'', after '' Warcraft II: Ti ...
'', mods called ''
Counter-Strike
''Counter-Strike'' (''CS'') is a series of multiplayer tactical first-person shooter video games, in which opposing teams attempt to complete various objectives. The series began on Windows in 1999 with the release of the first game, '' Counte ...
'' and ''
Defense of the Ancients
''Defense of the Ancients'' (''DotA'') is a multiplayer online battle arena (MOBA) mod (video gaming), mod for the video game ''Warcraft III: Reign of Chaos'' (2002) and its expansion, ''The Frozen Throne'' (2003). The objective of the game is ...
(DotA)'' respectively'','' drove sales of the original software for years.
Device drivers
Modded
drivers are made for improved performance which official versions of drivers do not offer or in cases where there are no official versions of drivers for new
hardware designed for older
operating system
An operating system (OS) is system software that manages computer hardware and software resources, and provides common daemon (computing), services for computer programs.
Time-sharing operating systems scheduler (computing), schedule tasks for ...
s such as
Windows 98
Windows 98 is a consumer-oriented operating system developed by Microsoft as part of its Windows 9x family of Microsoft Windows operating systems. It was the second operating system in the 9x line, as the successor to Windows 95. It was Software ...
.
Computer hardware
Case modding
Case modification, commonly referred to as case modding, is the modification of a computer case or a video game console chassis. Modifying a computer case in any non-standard way is considered a case mod. Modding is done, particularly by Compute ...
may range from simple case (or ''chassis'') painting, to extensive case modifications with custom-fabricated pieces. The terms ''modding'' and ''modder'' have expanded to encompass a broad range of customization by
personal-computer enthusiasts, especially in
gaming PCs, including: custom and homemade hard- and soft-line
liquid cooling
Liquid cooling refers to cooling by means of the convection or circulation (fluid dynamics), circulation of a liquid.
Examples of liquid cooling technologies include:
* Cooling by convection or circulation of coolant, including water cooling
* L ...
loops; installation of
LED
A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresp ...
strips and other lighting effects; replacement of stock cooling fans with high-performance ones (on
CPU coolers, power supplies, cases, drive bays, and other components); "
delidding" of CPUs and
GPUs
A graphics processing unit (GPU) is a specialized electronic circuit designed for digital image processing and to accelerate computer graphics, being present either as a discrete video card or embedded on motherboards, mobile phones, personal ...
to replace their stock
thermal paste and pads with high-
thermal-conductivity ones; addition of individually sleeved (and often color-coordinated) cabling; replacement of various heat sinks with custom liquid-cooling water blocks on components normally air-cooled (e.g.
RAM
Ram, ram, or RAM most commonly refers to:
* A male sheep
* Random-access memory, computer memory
* Ram Trucks, US, since 2009
** List of vehicles named Dodge Ram, trucks and vans
** Ram Pickup, produced by Ram Trucks
Ram, ram, or RAM may also ref ...
, GPUs, and
SSDs); addition of new components not usually found in PCs, such as electronic timers or temperature and humidity alarms; custom soldering to replace or change the behavior of components; expansion of the motherboard's capabilities with
PCIe
PCI Express (Peripheral Component Interconnect Express), officially abbreviated as PCIe, is a high-speed standard used to connect hardware components inside computers. It is designed to replace older expansion bus standards such as Peripher ...
add-in cards and risers (the latter also used to mount graphics cards sideways to show them off better); addition of server hardware into a consumer-grade system; and extensive
overclocking
In computing, overclocking is the practice of increasing the clock rate of a computer to exceed that certified by the manufacturer. Commonly, operating voltage is also increased to maintain a component's operational stability at accelerated sp ...
through detailed benchmarking that seeks to squeeze out every last percentage of performance improvement without the system becoming unstable.
Cars and vehicles
Orthopedic
Ortho-modding is the car adaptation (seats,
pedals, etc.) to help drivers to prevent, correct and diminish light
orthopedic
Orthopedic surgery or orthopedics ( alternative spelling orthopaedics) is the branch of surgery concerned with conditions involving the musculoskeletal system. Orthopedic surgeons use both surgical and nonsurgical means to treat musculoskeletal ...
and
backbone/
spine
Spine or spinal may refer to:
Science Biology
* Spinal column, also known as the backbone
* Dendritic spine, a small membranous protrusion from a neuron's dendrite
* Thorns, spines, and prickles, needle-like structures in plants
* Spine (zoology), ...
problems.
Eco-modding
Eco-modding is the reduction of drag, petroleum car adaptation to use renewable energy (generally, changing or adding a new
engine
An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy.
Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power ge ...
or
motor
An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy.
Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power gene ...
), generally
hydrogen
Hydrogen is a chemical element; it has chemical symbol, symbol H and atomic number 1. It is the lightest and abundance of the chemical elements, most abundant chemical element in the universe, constituting about 75% of all baryon, normal matter ...
or
electricity
Electricity is the set of physical phenomena associated with the presence and motion of matter possessing an electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwel ...
. See
hybrid car
A hybrid vehicle is one that uses two or more distinct types of power, such as submarines that use diesel when surfaced and batteries when submerged. Other means to store energy include pressurized fluid in hydraulic hybrids.
Hybrid powertrain ...
. Occasionally, it has been known to run a
Diesel engine
The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...
on plant and animal oils. See
Biodiesel
Biodiesel is a renewable biofuel, a form of diesel fuel, derived from biological sources like vegetable oils, animal fats, or recycled greases, and consisting of long-chain fatty acid esters. It is typically made from fats.
The roots of bi ...
.
Performance tuning
Car
A car, or an automobile, is a motor vehicle with wheels. Most definitions of cars state that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people rather than cargo. There are around one billio ...
and
engine tuning
Engine tuning is the adjustment or modification of the internal combustion engine or Engine Control Unit (ECU) to yield optimal performance and increase the engine's power output, economy, or durability. These goals may be mutually exclusive; ...
are modification of a car for enhanced performance, in engine power output, handling, aerodynamics, or cosmetic purposes. See also
:Vehicle modification.
Industrial machines
Factories get rather expensive machines that are used to mass-produce specialized parts. These machines can be altered to make parts other than how the manufacturers of the machines designed or intended them. The legality of doing this depends on who owns the machines, and whether the agreement, that supplied the machines to the factories, said anything about this, and what the laws are in the nation where this is being done.
For example, the machines might be leased from the manufacturer of the machines. If they are ever to be returned, they need to go back in the same kind of condition and engineering shape as when they were first delivered. There is an annual physical inventory to make sure the factory has everything that they are leasing. This audit might be done by representatives of the leasing company, who are looking to see recognizable machines, that match their models and safety rules.
Pens
Pen-modding is the act of combining many pen parts either to help with
pen spinning
Pen spinning is a form of object manipulation that involves the Dexterity, deft manipulation of a writing instrument with hands. Although it is often considered a form of self-entertainment (usually in a school or office setting), multinational c ...
, in which a perfect balance is desired to create an ideal spinning pen, or simply for decoration. These pen mods can either be made by combining parts from different pens and/or mechanical pencils, or by buying modded pens online. In some cases, pen mods can exceed over $30–40 USD per pen.
Custom Pen Spinning Gear, Japanese Mechanical Pencils and Pens
PenWish. Retrieved on 2010-11-26.
See also
* Body modification
Body modification (or body alteration) is the deliberate altering of the human anatomy or human physical appearance. In its broadest definition it includes skin tattooing, socially acceptable decoration (''e.g.'', common earring, ear piercing in ...
* Custom house
A custom house or customs house was traditionally a building housing the offices for a jurisdictional government whose officials oversaw the functions associated with importing and exporting goods into and out of a country, such as collecting ...
* DIY audio Audio equipment modifications and construction.
* Hackerspace
A hackerspace (also referred to as a hacklab, hackspace, or makerspace) is a community-operated, often "not for profit" (501(c)(3) in the United States), workspace where people with common interests, such as computers, machining, technology, sci ...
* Holga An inexpensive brand of medium-format cameras that are often modded in numerous ways by their owners.
* Video game art
Video game art is a form of computer art employing video games as the artistic medium. Video game art often involves the use of patched or modified video games or the repurposing of existing games or game structures, however it relies on a b ...
* Modular design
Modular design, or modularity in design, is a design principle that subdivides a system into smaller parts called ''modules'' (such as modular process skids), which can be independently created, modified, replaced, or exchanged with other modules ...
References
{{reflist, 30em
Computer hardware tuning
Computing culture