In the player history screen type "darkgoat" This will enable the following cheat keys:
In the player history screen:
Left-Shift Backspace - Add selected mission to history
Left-Shift = - Toggle outcome of selected mission
Left-Shift 0 - Add all missions. (Make all missions accessible)
In the game:
Left-Shift P - dump a PCX image file to PSGRESOURCEARTSCREENS
Left-Shift M - dump a continuous stream of PCXs (fill up your hard disk quick)
Left-Shift 8 - jump to vicinity of target
Left-Shift 9 - match velocity with target
Left-Shift 0 - explode targeted ship
Left-Shift i - make player invulnerable.
Left-Shift w - force mission win