Pause game play, then activate the following cheats by entering the corresponding codes. Note: The game may crash if too many cheats are enabled:

CHEAT FUNCTION - CHEAT CODE
Extra life - itsawonderful or gimmejim
Stick figure mode - hatman
Extra continue - can o worms
Maximum continues - onandonandon
1000 bullets - popquizhotshot
Full energy - noble
Invincibility - you are sod
View ending sequence - do not go there
Maximum plasma gun - justwhatyouseepal
Maximum life and energy - threemileisland
Access first five levels - slaugtherhouse
Access first 11 levels - romario
Access all levels - coolgameshiny
Access all levels - getthecheesetosickbay
Appear as Groucho Marx - pulsating
Appear with red afro - festering
Appear with black afro - bloated
Appear with antennae - pusfilled
Appear with big lips - sweaty
Appear with huge glasses - malformed
Appear with arrow in head - slugforabutt
Display frame rate - framerate
Display development team - iddqd
Displays testing team - idkfa
Level skip - ripley
Suicide - trust no one
Screen shot [NOTE 1] - say cheese
Homing missile - apollo13
Displays screen coordinates - beammeup
Press [Ctrl] for free movement; press E to disable - upupandaway
Toggle God mode - trentganino
Toggle God mode - bangersnmash
Enable level 2 if playing level 1 - leroybrown
Enable level 3 if playing level 2 - lv426
Enable level 4 if playing level 3 - feklhr
Enable level 5 if playing level 4 - joshua
Enable level 6 if playing level 5 - dagobah
Enable level 7 if playing level 6 - titanic
Enable level 8 if playing level 7 - olympic
Enable level 9 if playing level 8 - yavin
Enable level 10 if playing level 9 - booger
Enable level 11 if playing level 10 - phlegm
Enable level 12 if playing level 11 - kleenex
Enable level 13 if playing level 12 - partridgeplace
Enable level 14 if playing level 13 - gottaloveamonkey
Enable level 15 if playing level 14 - locutus
Enable level 16 if playing level 15 - mansbestfriend
Enable level 17 if playing level 16 - botanybay
Enable level 18 if playing level 17 - innerspace
Enable level 19 if playing level 18 - squanto
Unknown - harry

NOTE 1: The screen shot will be saved in the game directory in IFF file format.

Pause game play, then activate the following cheats by entering the corresponding codes. Note: The game may crash if too many cheats are enabled:

CHEAT FUNCTION - CHEAT CODE
Extra life - catmode
Extra continue - and so on[Period][Period]
Full energy - sofabord
Invincibility - larry wall
View ending sequence - I love cows
Suicide - hybris
Screen shot [NOTE 1] - [Period]dot
Press [Ctrl] for free movement; press E to disable

NOTE 1: The screen shot will be saved in the game directory in IFF file format.

-Complete the game under the easy difficulty setting to view a long text about worms, then complete the game under the normal or difficulty setting to view an animation in which Jim meets Princess. After the credits complete, another animation will play.

-During the ending sequence under the difficult difficulty setting, Jim will go on about how you are the best and that the company cares about you.

-Note: Play track 23 of the game disc in an audio CD player to hear hear the speech about worms for the easy difficulty setting ending. You will notice that Jim knocks you for playing on "practice" mode, however this is a mistake as it is "easy" mode, not "practice" mode. Play track 27 to Earthworm Jim praising you from the ending for the difficult difficulty setting.

Occasionally while walking, you will hear a sheep and see some swirling lights. This means that part of the level has changed. Backtrack to find bonus health power-ups or ammo.