Turok: Dinosaur Hunter

Enter CMGTSMMGGTS as a password to activate the all weapons cheat.

Enter the following codes in the "Enter Cheat" screen. Resume game play, then pause. Enter the cheat menu and set each enabled code as desired. All cheats entered can be saved after reaching a save point.
The Big Cheat
Enter NTHGTHDGDCRTDTRK as a code. This will enable invincibility, all weapons, unlimited ammo, infinite lives, full map, big head, level skip, and warps (Long Hunter, Mantis, T-Rex, Campaigner). All weapons
Enter CMGTSMMGGTS as a code. Unlimited ammo
Enter BLLTSRRFRND as a code. Disco mode
Enter SNFFRR as a code. Colors will flash and the animals and people will dance. Gallery
Enter THBST as a code. Allows enemies to be viewed, scaled, and rotated in 3D. Infinite lives
Enter FRTHSTHTTRLSCK as a code. Pen and ink mode
Enter DLKTDR as a code. Graphics will be in black and white line art, similar to a sketchbook. Robin's cheat
Enter RBNSMTH as a code. Enables credits, big heads, all weapons, unlimited ammunition, and invincibility. Greg mode
Enter GRGCHN as a code. Enables all the features of Robin's cheat except invincibility. Dana's cheat
Enter DNCHN as a code. All enemies will be smaller. Display credits
Enter FDTHMGS as a code. Spirit mode
Enter THSSLKSCL as a code. Enables invincibility with slow-moving enemies. Show enemies
Enter NSTHMNDNT as a code. Enemies will appear as red arrows on the map. Purdy colors
Enter LLTHCLRSFTHRNB as a code. The game environment will appear in rainbow colors after the next cut-scene or using a teleport-portal. Quack mode
Enter CLLTHTNMTN as a code. The graphics and game animations will be degraded. Fly mode
Enter LKMBRD as a code. Then, press R or L to move up or down. Gary's cheat
Enter GRHRNR as a code. All keys
Enter THSCKSTFTHSHSCK as a code. Full map
Enter CHTRSNRPRSPR as a code. Amy Jam
Enter GLTBNK as a code. Rhia Jam
Enter FJHJJ as a code. Advance to Campaigner
Enter LKNGDNTHTLNCLTH as a code. Invincibility
Enter RLMNDNTCHT as a code. Advance to Level 1
Enter TSKTSKTSK as a code. Advance to Level 2
Enter CHTLKDG as a code. Advance to Level 3
Enter HNSHM as a code. Advance to Level 4
Enter THRTCRD as a code. Advance to Level 5
Enter GHTTBSHMD as a code. Advance to Level 6
Enter HCNLTHRSLF as a code. Advance to Level 7
Enter STHSNCSSR as a code. Advance to Level 8
Enter THTDSTSCK as a code. Advance to Longhunter
Enter BSSNMBRN as a code. Advance to Mantis
Enter CRPCRL as a code. Advance to T-Rex
Enter JRSSCHT as a code.

Enable the "Fly mode" code during game play. Then restart the game using the menu. When you are at the title screen and Turok shoots his bow, press R to go up or L to go down into the floor.

You can kill things faster with your knife if you cut them as far back as possible. This works better if done in the back. It is possible to kill raptors under the normal difficulty setting with three slices.

Defeat the Long Hunter, but do not take the key. Instead, warp to level 1 and intentionally die. Do not press Start, and watch the ending sequence. You should go back to the Long Hunter and a Hummer will return. Then, warp back to level 1 and intentionally die again. Do not press Start. Eventually, you will return to the Long Hunter with the first Hummer waiting for you, then a second one will appear at the same time. For a real chalange, enable the "Disco mode" code.