Arma is a military simulator that emphasizes Team work, Coordination, communication, and command. It features a mix of Infantry and vehicle combat(Jets, helicopters, and big planes included). Not only can you play it as a shooter, but as an rts or squad based shooter. There is base building and reasource collecting(earning cash through captured towns, killing, and salvaging). This game is pretty demanding so you will require a decent computer to run it.
Other facts:The game was made by the same people who made the First Operation Flashpoint. Servers can support 64 players and thousand of AI under there command. The game world is one large map(the size of a small country) and can have multiple things happening on it. Like the source engine, Bohemia uses their engine and constantly adds on to it.
Games in the Series:Arma: Cold war Assault(It is Operation Flashpoint, but re-released under a new name) - See Op:Flashpoint
Arma: Armed Assault - First game in the series
Arma 2 - Second game in the series often criticised for its bugginess
Arma 2: Operation Arrowhead - Standalone expansion to Arma 2, fixes many problem and you can play Arma 2 missions in it if you own the first Arma 2
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Get it here on steam at:
http://store.steampowered.com/search/?term=ArmaOfficial Websites:
http://www.arma2.com/game-features/arma-2-features_en.htmlhttp://www.arma3.com/Arma 3 Teaser Trailer:http://www.youtube.com/watch?v=DKKbisvGspQ