God of War I-III are other ones I use when I am in the mood to do some gruesome dismemberment of baddies. Love the large group slaughters on these games and there is always the centaurs that are fun to annihilate.

Love the fact that there is pretty much not a limitation to the gore on those titles. Always seems cheep in other games when you smash something with a hammer and it just disappears or falls to the ground and dies by disappearing. Plus the explosions of red and green orbs are always a nice reward.

GTA was one of the games I use to do this with but my wife burned me out on GTA before IV came out. She would spend 3-4 hours at a whack just driving over people with cars.