{{Infobox video game | title = Sentinel | collapsible = | state = | image = | caption = | developer = Origin8 Technologies | publisher = | series = | engine = | platforms = iOS | released = February 27, 2009 | genre = Tower defense | modes = }}
'''''Sentinel: Mars Defense''''' is an iOS sci-fi tower defense game developed by British indie studio Origin8 Technologies and released on February 27, 2009.<ref>{{cite web|url=https://www.metacritic.com/game/sentinel-2009/|title=Sentinel|work=Metacritic|access-date=2023-11-01|archive-date=2026-04-26|archive-url=https://ghostarchive.org/archive/20260426100416/https://www.metacritic.com/game/sentinel-2009/|url-status=live}}</ref> It was followed by the sequels '''''Sentinel 2: Earth Defense''''' (2009),<ref>{{cite web|url=https://www.metacritic.com/game/sentinel-2-earth-defense/critic-reviews/?platform=ios-iphoneipad|title=Sentinel 2: Earth Defense|work=Metacritic}}</ref> '''''Sentinel 3: Homeworld''''' (2010),<ref name="metacritic.com">{{cite web|url=https://www.metacritic.com/game/sentinel-3-homeworld/critic-reviews/?platform=ios-iphoneipad|title=Sentinel 3: Homeworld|work=Metacritic}}</ref> and '''''Sentinel 4: Dark Star''''' (2014).<ref name="metacritic.com1">{{cite web|url=https://www.metacritic.com/game/sentinel-4-dark-star/critic-reviews/?platform=ios-iphoneipad|title=Sentinel 4: Dark Star|work=Metacritic}}</ref>
==Critical reception==
===''Sentinel: Mars Defense''=== ''148Apps'' wrote "''Sentinel'' is easily one of the best tower defense games in the App Store, 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?"<ref>{{cite web|url=http://www.148apps.com/reviews/sentinel/|title=Sentinel|work=148apps.com|date=19 May 2009 }}</ref> 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".<ref>{{cite web|url=http://www.appsafari.com/games/8813/sentinel/|title=Sentinel Mars Defense iPhone game app review - AppSafari|work=appsafari.com}}</ref>
===''Sentinel 2: Earth Defense'' === SlideToPlay said "''Sentinel 2'' manages to stand out amidst the crowded tower defense genre"<ref>{{cite web|url=http://www.slidetoplay.com/review/sentinel-2-earth-defense-review/|title=Sentinel 2: Earth Defense|work=Slide to Play}}</ref> ''TouchArcade'' 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."<ref>{{cite web|url=http://toucharcade.com/2009/07/08/sentinel-2-earth-defense-does-it-live-up-to-the-original/|title=Sentinel 2: Earth Defense Review - Touch Arcade|work=Touch Arcade|date=8 July 2009 }}</ref> ''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."<ref>{{cite web|url=http://www.appspy.com/review/3421/sentinel-2-earth-defense|title=Sentinel 2: Earth Defense Review|author=Damian Chiappara|date=30 June 2009|work=appspy.com}}</ref> ''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."<ref>{{cite web|url=http://www.148apps.com/reviews/sentinel-2-earth-defense/|title=Sentinel 2: Earth Defense|work=148apps.com|date=9 July 2009 }}</ref>
===''Sentinel 3: Homeworld''=== ''Sentinel 3'' has a Metacritic score of 87% based on 9 critic ratings.<ref name="metacritic.com"/>
===''Sentinel 4: Dark Star''=== ''Sentinel 4'' has a Metacritic score of 72% based on 5 critic reviews.<ref name="metacritic.com1"/>
==References== {{reflist|2}}
Category:2009 video games Category:2010 video games Category:2014 video games Category:Android (operating system) games Category:IOS games Category:IOS-only games Category:Tower defense video games Category:Video game franchises introduced in 2009 Category:Video game franchises Category:Video games developed in the United Kingdom