During gameplay quickly press left , o, x, right, o, x, down,o,x.This brings up a menu with options like invincibility, maxout (gives you all weapons and a gas mask), pogo (when you walk up to a wall with a ledge at the top, you are sent up to the top...
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In the level "Robotics Facility" or something like that, at the beginning, there's a huge pit on front of you. Go slowly forward until you drop onto a small cliff. Turn right and you should see a narrow opening. Go inside the and get a bonus life (if...
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