Robotron

HIDDEN MESSAGE: Programmers screen credits - 3 combo trick (must be done while game is playing. Also, each combo must be done within 1/4 of a second of each other!).
1. Move RIGHT+fire UP+1P
2. Move UP+fire DOWN+2P
3. Move DOWN+fire UP. Let go of fire UP and message should appear.

There’s only 1 Mikey on the Brain waves, and all the Brains will center on killing him first; don’t pick him up, just protect him! Brains can also be lured to constantly run into the right wall (if you stay on the right wall too).

BUG: Harmless tanks - On the tank wave, leave 1 tank and avoid its fire until it stops (20 shots)