2600 Pac-Man has to be the most overly hated game ever. It's a fun game that's different from the arcade game (duh, it's a 2600 port) but captures the spirit of the game well, has decent AI, and the gameplay works well. In contrast, Asteroids, which is somehow considered one of the 2600's classics, is incredibly boring and easy and moving your ship feels very awkward (not that you actually NEED to move it, as any decent player can just stay in the middle of the screen and play the game for hours without losing!)