De-animator!

I love this game!

Based on the works of H.P. Lovecraft, it's a simple but effective battle between a man and a wave of zombies. You've got a six-shooter gun and a 4-shot shotgun (to switch between the two, hit the shift button). The graphics and sound are very basic, but the use of shadows is very creepy and the mood is superb.

Play it here and enjoy.