id Anthology Cheats

Try this in a level where theres a really long drop (The elevator section in Bloogton Towers is perfect). Drop from a ledge, and just as you begin to drop, shoot straight down. As the falling Keen reaches the shot, he will suddenly stand on it, like its a ledge or elevator, but you will still be zooming down at the speed of the shot. Now heres the cool bit: when you reach the bottom, the shot will disappear, but you will be standing just above the ground (sort of in mid-air). Dont move, just aim up, shoot....and now youll be doing the opposite thing. Now Keen will be hurtling towards the top at the speed of the shot. Saves you from all that jumping and grabbing ledges.