This compilation game combines both of the Atari classics: Centipede & Millipede. Both games can be played in either "Classic" mode or "Enhanced" mode. "Classic" has the same original graphics from the 80s. "Enhanced" has larger graphics that are slightly updated. The player can also select between "Default Difficulty" or "Throttle Monkey" (everything moves faster and there are more enemies on-screen.) The gameplay remains the same as the original games.