Quake Codes -

Debug mode:
Enter QQQQ QQQQ QQQQ QQQQ as a password and ignore the "Incorrect Password" message. A "Debug" selection will appear on the option menu. Level select, all weapons, invincibility, and monster targeting may now be accessed.

Full weapon passwords:
Enter one of the following passwords to start at the corresponding level with full weapons.

Level	Easy	Normal
Realm of Black Magic	?DRY OPFG P3BT VBKX	6DRW OPFG T3BR VBJX
The ElderWorld	95RV TPFG QQBT JBJT	5SR9 TPFG VQBR JBCT
The NetherWorld	81RV 6PFG RGB5 5BJH	41R9 6PFG WGBQ 5BCH
Shub-Niggurath's Pit	79RV 2PFG R7BS SBJF	39R9 2PFG W7BQ SBFC
Level	Hard	Nightmare
Realm of Black Magic	2DR? OPFG Y3BP VBCX	YDR8 OPFG 23BM V3BX
The ElderWorld	1SR7 TPFG 2QBP JBBT	XSR TPFG 3QBM JBFT
The NetherWorld	01R7 6PFG 0GBN 5BBH	W1R5 6PFG 4GBL 5BFH
Shub-Niggurath's Pit	Z9R7 2PFG 07BN SBBF	VR95 2PFG 47BL SBBF

Hint: Items, warp, and more:
Begin game play on level 3, and reach the area before the elevator, near the end. Platforms with two enemies should be over your character at this location. Kill them, and a cage behind your character will open, revealing armor. Shoot the wall behind the armor to find a warp that will transport your character on the platforms. Go to the platform that contains missiles, face to the right, and shoot the wall. This reveals a secret hallway with another warp, that is actually a trap. The floor will open up, revealing lava. Sidestep to the right and run to the warp as fast as possible to reach the Ziggurat Vertigo level.