http://toucharcade.com/2012/06/26/cross-platform-play-zombies-and-lots-of-shooting-critical-strike-portable-apparently-has-it-all/ This game looks fantastic! I've been dreaming about a good CS port. I really hope they do it well, though. The only thing worse than no port, is a bad port that poisons the well for future attempts.
This is a good cs port. The online is awesome. You can also play with bots on a singlep player mode. I am a current beta tester of this game and i think game is ready to release with the current build. Only thing i noticed though is that you cannot buy any guns like in the CS game.