Cheat mode:
Type one of the following codes during gameplay:

Result - Code:

Unlimited oil - olgusher
Full map mode - olcds
Super jumps - olbounce
Flight mode1 - olairhead
Teleport mode - olzip
Skip to Boss - olappear
Automatic reload - olwimpy
View frame rate - olfps
View coordinates - olgps
View FMV sequences - olscreening
Additional heart - olrx
Three additional hearts - olmorerx
Invisibility - olether
Gatling gun - olstinnet
Bronze badge - olyahoo
Jet pack - olshadows
Commit suicide - oltombstone
God mode - olimyella
Full health - oler
Level skip - olscore
All weapons, full armor - olpostal
Additional inventory items - oljackpot
Unlimited ammunition - olash
Automatic reload - olwimpy
Immobile enemies; logic mode - olredlite
More oil - olopec