PACMAN
PACMAN, unmodified and unashamed: four ghosts, one maze, every dot must go. The power pellets still flip the chase for a few precious seconds, and the fruit still appears exactly when you're too busy to grab it.
This version keeps the classic ghost personalities — one chases, one ambushes, one wanders — which is why the maze still teaches routing forty years on.
Tip: clear the maze's hardest corner (the one with the awkward T-junction) early, while ghost speed is low. Late-game returns to messy corners are where lives go. The retro games tag has the rest of the arcade.