Type 'debugon' while playing to enable debug mode. In this mode
 dinosaurs will ignore your presence untill you shoot. Also you have
 unlimited ammo in debug mode and lava does not kill you.
 In debug mode: 
 
 Ctrl - makes you run REALLY fast.
 Shift + S - switches on/off slow mode.
 Shift + T - switches on/off timer indicating polygons per frame and
 time used to render this frame (in milliseconds).
 Shift   N - switches on/off long Jumps
 TAB - Reveal Map