Run the Tyrian 2000 setup program. Then, highlight the "Game Detail" option and press W.
Open an MS-DOS window and change the current directory to the Tyrian 2000 game directory. Type "file0001 yesxmas" at the DOS prompt, then press Y when prompted. This will change various items, weapons, ships, and sounds to a Christmas theme. Note: Christmas mode is date-sensitive and will only remain active until December 31, 1999.
At the difficulty selection screen, press [Shift] + G.
Enable the "Impossible difficulty setting" code, then press [Shift] + ] at the difficulty selection screen.
While playing the game, press [Backspace] + [F10]. If you entered the code correctly, the message "Cheaters always prosper" will appear.
While playing the game, press [F2] + [F3] + [F6]. If you entered the code correctly, the message "Cheaters always prosper" will appear.
While playing the game, press [F2] + [F6] + [F7]. If you entered the code correctly, the message "Cheaters always prosper" will appear. Note: This does not effect Super Arcade ships or a game in Super Tyrian mode.
While playing the game, press [Backspace] + [Minus]. If you entered the code correctly, the message "Cheaters always prosper" will appear.
While playing the game, press [Backspace] + [Scroll Lock]. If you entered the code correctly, the message "Cheaters always prosper" will appear.
While playing the game, press [Backspace] + [Number Lock]. If you entered the code correctly, the message "Cheaters always prosper" will appear.
Enter one of the following codes at the main menu to activate the corresponding cheat function:
| Result | Cheat Code |
| Experimental PQZ ship | techno |
| TX Silvercloud ship | unknown |
| Stormwind - The Elemental ship | stormwind |
| Ninja Star ship | stealth |
| Foodship Nine ship | weird |
| Dragon ship | lizard |
| Captured U-fighter | enemy |
| Pretzel Pete Truck ship | pretzel |
| Nort-Ship Z | nortshipz |
| Destruct mini-game [Note] | destruct |
| Super Tyrian mode on Lord of the Game difficulty | engage |
| Super Tyrian mode on Suicide difficulty | Hold [Scroll Lock] and type engage |
Note: Press [F1] during the mini-game for the controls.
































