Tombraider
Press the codes within the game...
First go to an open area
Take a little step forwards (SHIFT)
Take a little step backwards (SHIFT)
Turn around AT LEAST 3 times
Jump forwards (ALT + UP)
You now go to the next level...
First go to an open area
Take a little step forwards (SHIFT)
Take a little step backwards (SHIFT)
Turn around AT LEAST 3 times
Jump backwards (ALT + DOWN)
You now get all the weapons...