According to ESRB, this game contains: Blood, Intense Violence
Parents should be careful with this game—if their children have any taste at all, they'll want it, but it's an extremely violent game, and isn't really appropriate for players below their mid-to-late teens.
Counter-Strike players should pick this up right away, as it offers the exact same game they've been playing for years, only now the grenades bounce more realistically.
Fans of Psi-Ops should check the game out-the gravity gun is nearly as fun as that game's TK was.
Deaf and Hard of Hearing gamers are in for a treat, as the game contains the most comprehensive subtitles in history—everything is subtitled, even the most minor audio cue.