''Sentinel: Mars Defense'' is an

iOS iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware. It is the operating system that powers many of the company's mobile devices, including the iPhone; the term also includes ...

sci-fi

tower defense Tower defense (TD) is a subgenre of strategy games where the goal is to defend a player's territories or possessions by obstructing the enemy attackers or by stopping enemies from reaching the exits, usually achieved by placing defensive struc ...

game developed by British indie studio Origin8 Technologies and released on February 27, 2009. It was followed by the sequels ''Sentinel 2: Earth Defense'' (2009), ''Sentinel 3: Homeworld'' (2010), and ''Sentinel 4: Dark Star'' (2014).

Critical reception

Sentinel: Mars Defense

148Apps wrote "Sentinel is easily one of the best tower defense games in the

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, and genre fans would be crazy not to get this one. Beyond the awesome eye candy, it's a pleasure to play...oh, and you get to blow aliens to bits. What more do you need?" Appsafari said "Are you a fan of TD games for the iPhone? Sentinel Mars Defense from origin8 is a Tower of Defense game for the iPhone with amazing graphics of rendered environments, towers and enemies".

Sentinel 2: Earth Defense

SlideToPlay said "Sentinel 2 manages to stand out amidst the crowded tower defense genre"

TouchArcade ''TouchArcade'' is a mobile video game website that launched in 2008. Arnold Kim of ''MacRumors'' worked on the site and its editor-in-chief was Eli Hodapp from 2009 to 2019. ''TouchArcade'' has been recognized as one of the best mobile game ...

wrote "If you happen to be new to the tower defense genre, Sentinel is a great place to start, especially with the current price of 99¢. Since Sentinel 2 is an evolution of the original, if you enjoy the first, you will enjoy the sequel. Both are among my favorite games, and while there is no shortage of tower defense games for the iPhone, in my opinion, both Sentinel games are among the best the App Store has to offer." AppSpy said "The game isn’t bad; it’s just not one of the better tower defence games and may not be worth the current price." 148Apps wrote "A combination of fantastic graphics and multi-layered complex gameplay make Sentinel 2 the best tower defense game on the App Store. Be warned - it may be tough to go back to seemingly simple TD games after experiencing what Sentinel 2 has to offer."

Sentinel 3: Homeworld'

Sentinel 3 has a Metacritic score of 87% based on 9 critic ratings.

Sentinel 4: Dark Star

Sentinel 4 has a Metacritic score of 72% based on 5 critic reviews.

References

{{reflist, 2 2009 video games 2010 video games 2014 video games Android (operating system) games IOS games IOS-only games Video game franchises Video game franchises introduced in 2009 Video games developed in the United Kingdom Tower defense video games