Type these codes in during gameplay to use them:
            OLIMYELLA Invincibility
            OLER Full health
            OLPOSTAL All weapons and ammo
            OLASH Unlimited ammo
            OLWIMPY Instant reload
            OLJACKPOT Adds inventory items
            OLOPEC Adds oil
            OLGUSHER Unlimited oil
            OLAIRHEAD Fly mode
            OLREDLITE Freezes enemies
            OLBOUNCE Super jump mode
            OLCDS Full map
            OLSCREENING Show cutscenes
            OLFPS Display frames per second
            OLGPS Display current coordinates
            OLTOMBSTONE Instant death
            HUBIGUBI for monster mode

            Level codes:
            OLHIDEOUT
            OLTOWN
            OLTRAIN
            OLCANYON
            OLMILL
            OLSIMMS
            OLMINER
            OLCLIFF
            OLRANCH