Type the codes in any time during a level.

 OLIMYELLA   -  Toggle invulnerability
 OLRX        -  Increases health by 1 heart
 OLMORERX    -  Increases health by 3 hearts
 OLER        -  1000% health
 OLYAHOO     -  Sheriffstar
 OLASH       -  Infinite ammo
 OLGUSHER    -  Infinite oil
 OLBOUNCE    -  Enhances your jumps
 OLOPEC      -  Oil
 OLREDLITE   -  Freezes your enemies
 OLETHER     -  Invisibility (network mode)
 OLAPPEAR    -  Makes your enemies visible again
 OLAIRHEAD   -  Fly mode, use the [X] and [C] keys to move up and down
 OLCDS       -  Super map mode, typing it three times returns you to
                normal map
 OLFPS       -  Displays frame rate as well as some buffering
                information
 OLGPS       -  Displays player coordinates in map mode
 OLJACKPOT   -  Gives you all items to complete the level
 OLPOSTAL    -  Ammo and all weapons. Typing again will give you more
                Gatling Gun ammo
 OLREDLITE   -  Logic toggle
 OLZIP       -  Teleport
 OLSCREENING -  Show Cutscenes
 OLWIMPY     -  Automatic reload
 OLTOMBSTONE -  Suicide


 Level Codes

 These codes will skip to the correponding level. The first 4 are on
 CD1. The remainder are on CD2.

 OLHIDEOUT
 OLTOWN
 OLTRAIN
 OLCANYON
 OLMILL
 OLSIMMS
 OLMINER
 OLCLIFF
 OLRANCH