Type debugon during game play to enable debug mode. Dinosaurs will ignore your character until
you shoot, weapons will have unlimited ammunition, and lava is not harmful. .Additionally, enter
one of the following codes to activate the corresponding cheat function.

Function - Code 

     Run very fast - Ctrl 
     Toggle slow motion - Shift + S 
     Toggle frame rate and polygons per frame 
     display - Shift + T 
     Longer jumps - Ctrl + N 
     Full map - Tab