Operation Neptune (video game)
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''Operation Neptune'' is an educational
computer game Video games, also known as computer games, are electronic games 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 gener ...
produced in 1991 by The Learning Company. The goal of the game is to guide a small
submarine A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...
through a variety of undersea caverns, collecting pieces of a ruined space capsule. Like other games by The Learning Company, Operation Neptune is
educational Education is a purposeful activity directed at achieving certain aims, such as transmitting knowledge or fostering skills and character traits. These aims may include the development of understanding, rationality, kindness, and honesty. Vari ...
and was intended for players age nine to fourteen (grades three through ten). It was released as part of the ''Super Solvers'' series for a time.


Plot

A team of
astronaut An astronaut (from the Ancient Greek (), meaning 'star', and (), meaning 'sailor') is a person trained, equipped, and deployed by a human spaceflight program to serve as a commander or crew member aboard a spacecraft. Although generally r ...
s and
scientist A scientist is a person who conducts Scientific method, scientific research to advance knowledge in an Branches of science, area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, ...
s have begun a secret research project on a distant planet. The research team's results were sent back to Earth on the "Galaxy space capsule", which malfunctioned, crashed into the ocean, and broke into many pieces. The capsule included several data canisters, each of which contains small snippets of the scientists' story, which is revealed to the player as the game progresses and data canisters are found. The capsule also contained some toxic chemicals, which have begun to leak out and threaten the health of the world's sea life. A recovery mission, code-named ''Operation Neptune'', is sent to recover the pieces of the capsule.


Gameplay

The game consists of two campaigns, called Voyager Game and Expert Game; the player selects one when creating a new save file. In both campaigns, the player must complete sixteen
levels Level or levels may refer to: Engineering *Level (instrument), a device used to measure true horizontal or relative heights *Spirit level, an instrument designed to indicate whether a surface is horizontal or vertical *Canal pound or level *Regr ...
, called Sectors, which are distributed across five Zones: Dragon Reef, Fossil Trench, Limestone Ridge, Sea Forest, and Hammerhead.


Piloting the Neptune

The game is action-oriented for the most part. In each Sector, the player's goal is to navigate a submarine (the Neptune) through maze-like passages, collect every data capsule, and reach the supply station at the end. The box cover illustration rendered by Marc Ericksen depicts the Neptune submarine recovery vehicle hovering above the basin of Fossil Trench recovering glowing toxic data capsules. The levels are presented in a
flip-screen This list includes terms used in video games and the video game industry, as well as slang used by players. 0–9 A ...
fashion. Along the way the player will encounter various aggressive and/or territorial sea creatures, which usually move about the level and perform actions in predictable and repeating patterns, as well as non-living hazards like sharp rocks and undersea volcanoes. If the Neptune makes contact with an enemy or hazard, it will lose
Oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as wel ...
. The Neptune is capable of firing ink pellets to stun sea creatures and render them harmless to touch, in the manner of an octopus or squid. However, the functionality of ink pellets is limited; enemies stunned in this way will recover and resume their dangerous behavior after a few seconds. Furthermore, the ink pellets are fired in a straight line from the nose of the Neptune, so the player must carefully aim their shots at their intended targets. Finally, the player is limited to only 21 ink pellets per Sector, with no way to replenish their supply during the level. Thus, the player cannot rely on ink pellets to keep the Neptune out of danger, and should only use them in desperate situations. In the Final Sector of either campaign, ink pellets are rendered entirely (or almost entirely) ineffective. To reliably avoid loss of Oxygen and conserve ink pellets, the player must exercise skill in avoiding enemy formations. Whenever the Neptune enters a new screen, the player is expected to stop and study the behavior of upcoming obstacles, plan their movements in advance, and then execute those movements successfully.


Solving problems

The game will frequently break away from the action-oriented gameplay to present the player with
math Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics ...
problems to solve. In problem-solving mode, the game employs a distinctly different interface, presenting text on one side of the screen and an illustration on the other. The math challenge takes the form of a word problem, and it is up to the player to determine the order of operations involved and arrive at the correct solution. Inputting an incorrect solution causes the player to lose Oxygen. If the Neptune survives the problem, the game then returns to action-game mode, resuming precisely where the player left off. Each Sector contains three invisible and unavoidable trigger points; when the Neptune crosses one of these trigger points, a chime plays and a beacon on the Neptune flashes. These trigger points are generally placed a safe distance away from enemies and hazards, so that the player will not be distracted during a difficult maneuver. After a few seconds, the game switches to problem-solving mode, and presents a word problem randomly selected from a set of problems appropriate for the current difficulty setting. The word problems are themed after situations that might concern a submarine pilot on a scientific expedition.


Types of math problems

* ''Ballast Control Panel'': Given a list of ten numbers and a sum S, the player must choose any combination of numbers from the list that add up exactly to S. This is framed in-story as the Neptune pilot needing to adjust the ballast in order to control the submarine's ascent or descent rate. In Voyager Game, the player typically selects from a list of numbers typically found in denominations of United States coin money (i.e. 1, 5, 10, 25). In Expert Game, the player typically selects from a list of
powers of two A power of two is a number of the form where is an integer, that is, the result of exponentiation with number two as the base and integer  as the exponent. In a context where only integers are considered, is restricted to non-negative ...
(e.g. 1, 2, 4, 8, 16). * ''Sonar'': The Neptune pilot is informed of an upcoming obstacle. Given the obstacle's current distance and rate of approach, the player must calculate the time to reach the obstacle, in the requested unit of time (either hours or minutes). * ''Search Grid'': Given a partially filled grid, the player is asked to calculate the
area Area is the quantity that expresses the extent of a region on the plane or on a curved surface. The area of a plane region or ''plane area'' refers to the area of a shape A shape or figure is a graphics, graphical representation of an obje ...
of either the shaded or unshaded region. * ''Toxicity Graph'': Given a bar chart, the player is asked to interpret two values and calculate the difference. This is framed in-story as the surface ship requesting data on the ecological impact of the Galaxy space capsule. * ''Scale'': This problem may occur when the Neptune acquires certain normal capsule pieces. The player must round the exact mass to a less precise value. * ''Distance Traveled Chart'': Given the average speed of the Neptune and a duration of time, the player must calculate the total distance traveled. * ''Window Crack'': This problem may occur when the Neptune travels through certain tight corridors. In-story, the Neptune's window has cracked, and the exact length of the crack must be accurately reported in order for the window to be replaced at the next supply station. The game displays a black line aligned alongside a ruler, and the player must determine the length of the black line. In later versions of this problem, the player is expected to report the length as a mixed number. * ''Water Tank'': In this problem's framing, the Neptune has a limited freshwater supply, and will not be able to replenish it at the next supply station. Given a
volume Volume is a measure of occupied three-dimensional space. It is often quantified numerically using SI derived units (such as the cubic metre and litre) or by various imperial or US customary units (such as the gallon, quart, cubic inch). The de ...
of freshwater and a rate of usage per day, the player must calculate the number of days that the Neptune's pilot can survive on the current supply. * ''Temperature'': In-story, a malfunction in the Neptune's onboard battery has reduced its electrical output, and the pilot must act to both conserve energy and preserve their food supply. The player must read an on-screen thermometer and calculate the appropriate temperature adjustment as requested in the problem. * ''Clock'': The game shows an analog clock which displays the time in military format. The player must calculate either a time or duration, depending on what the problem requests. * ''Power Supply'': The game displays a
line chart A line chart or line graph or curve chart is a type of chart which displays information as a series of data points called 'markers' connected by straight line segments. It is a basic type of chart common in many fields. It is similar to a s ...
, where the X-axis represents the Neptune's energy usage per hour and the Y-axis represents the Neptune's speed. Given that the Neptune will travel at S speed for T hours, the player must read the chart, determine the Neptune's energy usage per hour based on S, then multiply by T hours to calculate the Neptune's estimated energy usage over that duration. * ''Radio-Telephone Signals'': In-story, the Neptune is required to communicate with the surface ship at regular intervals. Given that the surface ship expects N contacts per hour, the player must calculate the duration of the intervals in between contacts. * ''Oil Supply'': Given a maximum oil supply and a gauge which displays remaining oil supply in ten equal increments, the player must read the gauge and accurately report the Neptune's remaining oil supply. * ''Capsule Piece Inventory'': In this problem, the player must calculate the sum of five individual weights listed in ounces, and report the total weight in
pound Pound or Pounds may refer to: Units * Pound (currency), a unit of currency * Pound sterling, the official currency of the United Kingdom * Pound (mass), a unit of mass * Pound (force), a unit of force * Rail pound, in rail profile Symbols * Po ...
s. The player is expected to use a calculator to accomplish this task. * ''Speed Graph'': Given a bar chart, the player is asked to interpret six values and calculate the
arithmetic mean In mathematics and statistics, the arithmetic mean ( ) or arithmetic average, or just the ''mean'' or the ''average'' (when the context is clear), is the sum of a collection of numbers divided by the count of numbers in the collection. The colle ...
of those values. * ''Navigation Chart'': Given a latitude-longitude chart with two markers, the player must calculate the latitudinal or longitudinal difference of those markers in degrees. In-story, the supply ship is requesting the Neptune's relative distance from the next supply station. * ''Speed Indicator'': The game displays a
speedometer A speedometer or speed meter is a gauge that measures and displays the instantaneous speed of a vehicle. Now universally fitted to motor vehicles, they started to be available as options in the early 20th century, and as standard equipment f ...
. The player must read the speedometer and input a new speed as requested by the problem. For example, the Neptune is traveling at 18 MPH, and the problem requests that the pilot reduce their speed by 1/3 of the current value; in this case the player must input a value of 12. * ''Toxicity Level Graph'': Not to be confused with the similarly-themed ''Toxicity Graph'' problem. In this problem, the game displays a line chart, where the X-axis represents time (with intervals marked in military time), and the Y-axis represents toxicity in PPM, with one Y-value being marked as "Normal". The player must read the graph and accurately report the number of minutes for which the region's toxicity was above "Normal". * ''Depth Gauge'': The game displays a graphic indicating the Neptune's depth in
feet The foot ( : feet) is an anatomical structure found in many vertebrates. It is the terminal portion of a limb which bears weight and allows locomotion. In many animals with feet, the foot is a separate organ at the terminal part of the leg made ...
, and the player must convert this reading into
fathom A fathom is a unit of length in the imperial and the U.S. customary systems equal to , used especially for measuring the depth of water. The fathom is neither an International Standard (SI) unit, nor an internationally-accepted non-SI unit. Hi ...
s. The problem initially hides the conversion method from the player; after one wrong answer, the game reveals that 6 feet = 1 fathom. * ''Water Pressure'': The game displays a line chart, where the X-axis is the Neptune's depth in feet and the Y-axis is the water pressure in
PSI Psi, PSI or Ψ may refer to: Alphabetic letters * Psi (Greek) (Ψ, ψ), the 23rd letter of the Greek alphabet * Psi (Cyrillic) (Ѱ, ѱ), letter of the early Cyrillic alphabet, adopted from Greek Arts and entertainment * "Psi" as an abbreviation ...
. Given a depth in feet, the player must use the chart to determine the current water pressure. * ''Data Canister'': In every Sector, the player must collect one data canister. Upon making contact with the canister, the game instantly transitions to problem-solving mode. All data canister problems feature an
arithmetic Arithmetic () is an elementary part of mathematics that consists of the study of the properties of the traditional operations on numbers— addition, subtraction, multiplication, division, exponentiation, and extraction of roots. In the 19th ...
or
geometric Geometry (; ) is, with arithmetic, one of the oldest branches of mathematics. It is concerned with properties of space such as the distance, shape, size, and relative position of figures. A mathematician who works in the field of geometry is ca ...
sequence five numbers long, with one of the numbers in the sequence removed; the player must calculate the missing number. Upon completing the sequence (or failing twice with enough surplus Oxygen), the player is rewarded with one part of a 15-part story. These data canisters are often found in hazardous locations, so the player must be prepared to move the Neptune to safety as soon as they are finished interacting with them. * ''Combination Lock'': At the end of every Sector is a supply station, which the player can only access by first obtaining all collectible items in that Sector. When the Neptune touches the supply station's door with all items collected, the game instantly transitions to problem-solving mode. All supply station problems feature a combination lock which serves as a timing-based math puzzle. The game first rotates the inner lock to generate an arithmetic equation; the outer lock then begins to rotate, and the player must stop the lock at the right time, when the correct answer lines up with the arrow. The player is presented with two arithmetic equations, and if the Neptune survives through both, the player successfully completes the Sector. The Final Sector features no math problems.


Managing oxygen

At the start of a new game, the Neptune has four Oxygen units (health) and two Oxygen Tanks ( lives). If the Neptune runs out of Oxygen at any point, the Neptune is destroyed. When this happens, if the player has at least one Oxygen Tank available, they are sent back to the last
checkpoint Checkpoint may refer to: Places * Border checkpoint, a place on the land border between two states where travellers and/or goods are inspected * Security checkpoint, erected and enforced within contiguous areas under military or paramilitary co ...
. Otherwise, the player loses all progress made in the current Sector, the Neptune is sent back to the start of the current Sector, all collectible items are returned to their original positions, and all previously solved math problems have to be solved again. Touching any enemy or hazard causes the Neptune to lose one Oxygen unit. When Oxygen is lost in this way, if the Neptune still has Oxygen remaining, the Neptune is granted temporary invulnerability, allowing them to escape immediate danger and prevent further loss of Oxygen. Giving an incorrect answer while in problem-solving mode also costs one Oxygen unit. While in problem-solving mode, if the Neptune has at least three Oxygen units to start with, and gives two incorrect answers, the game will display the correct solution to the problem and allow the player to continue as though the problem had been solved normally. In most Sectors, a
dolphin A dolphin is an aquatic mammal within the infraorder Cetacea. Dolphin species belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the ...
named Zoom appears in one of the screens. If the Neptune touches Zoom, one of two beneficial effects happen: either the Neptune's Oxygen is restored to full, or (if the Neptune currently has full Oxygen) the Neptune gets one extra Tank. The player is limited to six Tanks. In many cases, when the player reaches the screen where Zoom is located, Zoom will immediately attempt to swim off-screen, and the player must catch him before he escapes; if Zoom escapes the player this way, he will not respawn unless the player loses a Tank or reloads the game. Zoom does not appear in the Third Sector of Fossil Trench, nor the Final Sector. In the Final Sector, all enemies and hazards destroy the Neptune in one hit, and there are no checkpoints.


Differences between campaigns

While the Neptune travels through the same five zones in each campaign, the level layouts found in Expert Game are quite different from those found in the Voyager Game. In the Expert Game, hazards are placed in more dangerous arrangements, the enemies move in trickier patterns and have new attacks, and some screens feature strong ocean currents which push and pull the Neptune in unexpected and undesirable ways. In the Voyager Game, the Final Sector features four slow but large sea creatures which destroy the Neptune in a single hit; ink pellets are completely ineffective against them. In the Expert Game, the stage is filled with many fast and aggressive sharks; ink pellets only stun these sharks for a fraction of a second, but this can be used to alter their patrol patterns and make screens safer to cross.


References


External links

* * {{Authority control 1991 video games DOS games Children's educational video games Life simulation games Classic Mac OS games North America-exclusive video games Video games developed in the United States Windows games The Learning Company games Single-player video games