Use these passwords to skip different levels throughout the game.
Level 3:
BXLG 4GSH 46YJ L2?0
Level 4:
CXBF CG5P 1G5G HOTL
Level 5:
BX8L 5BNL W1D5 W3KR
Level 6:
BYS9 SBG? 78TS N2KL
Level 7:
BCYJ HG1B 7BFZ ?SKL
Level 8:
CX3F CG3P 1LDF HHSW
Level 9:
FFMX MGPH ZVNX WDJC
Level 10:
DVY8 YGDR PBYF 10JC
Level 11:
NKHB FLML VS63 0KQB
Level 12:
M18C 2L5Z YS74 CGQB
Level 13:
4JDN RGGN G8VN T7LB
Level 14:
3ZH? KB5X SH2P WMVB
Level 15:
3GJL KBR9 BT36 7YLB
Level 16:
TXLT GGD5 9PR7 68JL
Level 17:
TDXH KBNJ 5Q6F W2JC
Level 18:
JY1D CQ53 ZNW? 0XZC
Level 19:
SD8G TBXR 30CZ ?X5C
Level 20:
L5ZH 4HYQ 6VGW KZKF
Level 21:
CCCM TQ9F D7S9 R28L
Level 22:
GVM7 WVQ7 MBSS M7QC
Level 23:
GGRS P3Q7 Q0C6 89QB
Level 24:
Y1ZL VBGY CL11 FWBB
After you lose a life, just stay there. Every minute, a taunt will appear for about 10 seconds at random at the top of the screen. These are some examples of the taunts. "Look at the demon feet!", "I played Doom and I can't get up.", "You shouldn't have done that." If you wait long enough, I am sure there will be more! It's pretty neat, unfortunatly the taunts appear as text on the screen and are not spoken.
These are two more passwords. At the password screen type W93M 7H20 BCY0 PSVB to get all health & armor, all of the weapons, full ammo, take you to the last level, makes the laser more powerful than the BFG9000, and it also gives you three pentagram items. Another password to type at the password screen is ?TJL BDFW BFGV JVVB to give you a new menu with god mode, all weapons, level skip, all health, and show all of the map.