I rarely beat all my games. Thinking back, I can remember beating only a few games. Mafia, MOH:AA, and Max Payne come to mind. I guess you could throw NHL 2003 onto that list since I did play through quite a few 82 game seasons + Stanley Cup playoffs. Besides those, I haven't really beaten any game I own. I got bored with Diablo II midway through Act III, I got bored with GTA III once I got onto the third island, and I didn't even beat Deus Ex, a game I consider to be the best of all time. I got to the final level, ran out of almost all my ammo, and then was getting repeatedly killed by a bunch of spider bots, so I just said to hell with it and moved on. In Return to Castle Wolfenstein, I got to one of the uber soldat bosses, couldn't beat him, and stopped. I just play a game as long as it remains fun, but once it starts to lose that, then I quit.