Recommend me a addictive, enjoyable, PS3 game that lasts you a long time. (Read all, 10 points to best answer)?

Try Rainbow 6 Vegas 2. It has a online co-op (including campaign) and a multiplayer version. Plus the graphics is cool. You can pick out your guns and customize them (attachments and camo). Also you can customize your character with armor, clothes, and helmets/head gear (camo).