It is Action Replay Max. It is kinda like Game Shark or Game Genie from way back in the day. Basically, a cheating mechanism for games. (infinite energy, lives etc) You get a flash drive with it and can load codes onto it via USB on your computer or PS2 internet connection and you plug it into your USB drive on your PS2 and that way you don't have to type the codes in manually. The database for it is HUGE and they constantly are adding games on the list but for some reason the last update didn't have Manhunt 2 on it. But the codes for Manhunt 2 do exist as they list them on their site.