Atari Anniversary Edition

Hint: Better game versions:
Select the small button on the left side of a game and you will be able to play the later, updated version of it.

Hint: Centipede: Scorpions:
In levels 4 and higher, scorpions start appearing. Eliminate them quickly or they will poison the mushrooms. When the centipede touches them, it will start to dive down to the ground -- get out of the way.

Hint: Crystal Castles: Level 3: Warp:
In the "Hidden Ramp" stage, get the hat then go to the back corner of the hidden ramp. Jump before the hat wears off to advance to level 5.

Hint: Crystal Castles: Level 1-1: Warp:
Jump in the top left corner behind the building to get extra points and advance to level 3-1.
Information in this section was contributed by jonahsmy.

Hint: Crystal Castles: Level 5-3: Warp:
Jump in the top left corner in the crossroads part to get extra points and advance to level 7-1.
Information in this section was contributed by jonahsmy.

Hint: Crystal Castles: Level 5-4: Programmer initials:
Go to the top right and kill Berthilda. Jump up in the top right corner and "FXL" will appear.
Information in this section was contributed by jonahsmy.