Black Isle Level:
At the main menu highlight the "New Game" option , then hold L + R and press Left. Hold the buttons until the level has loaded.

Tower Block Level:
At the main menu highlight the "New Game" option, then hold L + R and press Right. Hold the buttons until the level has loaded.
Information in this section was contributed by CURRAN.

Rome Level:
At the main menu highlight the "New Game" option, then hold L + R and press Up. Hold the buttons until the level has loaded.

Russian Base Level:
At the main menu highlight the "New Game" option, then hold L + R and press Down. Hold the buttons until the level has loaded.

Special Features:
Press Start during game play to pause, then highlight the Timex-TMX at the inventory screen. Hold Y until "Secrets" reads "36/36".

Hidden Text:
Place the game in a PC compatible CD-ROM drive to find the text "Maybe some cheats will go here".

Faster Ledge Bail:
Crawl to an edge and face it, Next Hold in "R" trigger and press "forward", "A". And you should do a jump off the ledge.

Thanks to Revolution readers David Moyer and July!