It's worth noting that this game is region locked, according to Wikipedia:
[quote name='Wikipedia']The PS3 version of Army of Two is also the first game for the console known to be region-locked. EA claims that the region-locking is to prevent network lag caused by players from multiple regions, and to prevent the Asian region console owners from playing the US and European version of the game, as the Asian version has been censored to meet certain requirements. Nonetheless this move has received criticisms from certain parties.[/quote]
I'm kind of skeptical about the game itself being region locked (I've never heard of any PS3 game being region locked), but I know for sure the online portion is. With this being the Korean version, this is worth mentioning since it means you might only be able to play the game online with people who have Asian versions (I think it's just locked by continent, not by country) of the game. I don't know how it does the region locking (whether it can detect where you're playing from or which version you're playing), but because of this I'd be wary of purchasing this.