I saw a review for ArmA, looks awesome, and just I thought I'd just mention this (while we're talking about new/old games):
Return To Castle Wolfenstein: Enemy Territory
It is sooo additively fun, and you know the best part about it? It's completely free.
You can google it and download it from for about 330Mb.
It's set back in WWII and the graphics aren't half bad.
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Urakai
*Dark Dragoons*
CPL Urakai/2SQD/1PLT/1CMP/1REG/1BAT/Tadath/VEA [LoR] [RoM]