To use the cheats, you hit Ctrl-Enter, type 
 the appropriate phrase (all lower-case; the 
 cheats are case-sensitive), then hit Enter.
                                         
 UNLIMITED AMMO         - the truth is out there
 REPLENISH CURRENT AMMO - fight the future
 REFUEL                 - black oil
 INVINCIBLE             - trust no one
 NOCRASH                - i want to believe
 HEAL                   - this isnt happening