Level select
 
 Enter "FREEPLAY" as a password.
 
 Invincibility
 
 Enter "NODIE" as a password.
 
 All weapons
 
 Enter "GIMME" as a password.
 
 Invisibility
 
 Enter "NOSEEUM" as a password.
 
 Mini mode
 
 Enter "SHORTY" as a password.
 
 Big mode
 
 Enter "IMHUGE" as a password.
 
 Debug information
 
 Enter "THDOTEST" as a password.
 
 Level passwords
 
 Level - Password
 Boot Camp - BOOTCAMP
 Dinner Table - DINNER
 Bridge - OVERPASS
 Refrigerator - COOLER
 Graveyard - NECROPOLIS
 Castle - CITADEL
 Tan Base - MOUSE
 Revenge - ESCAPE
 Desk - ESCRITOIRE
 Bed - COT
 Plasticville - BLUEBLUES
 Toy Shelf - BUYME
 Cashier - EXPRESS
 Toy Train Town - LITTLEPEOPLE 
 Rocket Base - NUKEM
 Pool Table - EIGHTBALL