Enter "debugup" during play to enable cheat mode. Coordinates will appear in the top right hand corner of the screen to confirm correct code entry. Dinosaurs will how ignore your character until they are shot and you will have unlimited bullets and arrows for each weapon. . Additionally, activate the following cheats by entering the corresponding codes:

CHEAT FUNCTION - CHEAT CODE
Run faster - CTRL
Slow motion - SHIFT + S
Super jumps - CTRL + N
Flight mode - SHIFT + L
Remove trees - SHIFT + M
View frame rate - SHIFT + T
Full map - TAB
Increase View Range - SHIFT + ]
Decrease View Range - SHIFT + [
Phong Mapping - SHIFT + P
More Trees - SHIFT + I
Straight Trees - SHIFT + U
Env. Mapping - SHIFT + E
Clouds shadows off - SHIFT + C
V. Fog - SHIFT + F
Gourard Mapping - SHIFT + G