Enter all these cheats at the Enter Cheats screen.
LKMBRD-Fly Mode Given by: Eric
DLKTDR- Pen and Ink mode (black and white wireframes)
SNFFRR- Disco Mode (strobe lights flash while the enemies dance)
FRTHSTHTTRLSCK- Infinite Lives
THBST- Galley (view some of the enemies in 3d)
FDTHMGS- Show Credits
THSSLKSCL- Spirit Mode (slow-moving enemies and invincibility)
CMGTSMMGGTS- All Weapons
BLLTSRRFRND- Unlimited Ammo
RBNSMTH- Robin's Cheat (Invincibility, all weapons, unlimited ammo, big head and credits)
GRGCHN- Greg Mode (same as robins cheat only without invincibility)
DNCHN- Dana Mode (small enemies)
NSTHMNDNT- Show Enemies (displayes enemies as red arrows on map)
LLTHCLRSFTHRNB-Purty Colors (weird colors appear)
CLLTHTNMTN- Quack Mode (What Turok would look on Plastation or Saturn. HA!)
NTHGTHDGDCRTDTRK- Big Cheat (all the cheats including level warps)
Here is a cool trick. Before you enter the teleport in level 8, to fight the Campaigner, put on the spirit mode and unlimited ammo codes. Enter the teleport and stay in ONE place. Shoot the campaigner only with the mini gun. When you kill him Turok will run like a real idiot.