Activate the following cheats by starting the game with the corresponding command line options:

CHEAT FUNCTION - COMMAND LINE PARAMETER
Windowed game on desktop [NOTE 1] - -w
Disable sound - -xsound
Start from savepoint 1 [NOTE 2] - -start1
Start from savepoint 2 [NOTE 2] - -start2
Start from savepoint 3 [NOTE 2] - -start3
Start from savepoint 4 [NOTE 2] - -start4
Use save slot 0 - -slot0
Use save slot 1 - -slot1
Use save slot 2 - -slot2
Use save slot 3 - -slot3
Use save slot 4 - -slot4
Use save slot 5 - -slot5
Adjusted screenshots in 3Dfx mode - -nozlock

NOTE 1: Setting the Windows color setting to 256 is recommended.
NOTE 2: Enabling this code may crash the game.

Choose the pilot roster and select any slot. The history and missions screen should appear. Click in the history box, then type dethweezul (case-sensitive) to enable cheat mode. The word "Outcome" and a number will appear under each completed mission to confirm correct code entry. Then, then activate the following cheats by entering the corresponding codes:

CHEAT FUNCTION/SCREEN - CHEAT CODE
Add mission (Player History Screen) - LEFT SHIFT + Backspace
Toggle outcome of selected mission (Player History Screen) - LEFT SHIFT + EQUALS
All missions (Player History Screen) - LEFT SHIFT + 0
Screen shot in "psg\resource\art\screens" (During Game Play) - LEFT SHIFT + P
Continuous screen shots (During Game Play) - LEFT SHIFT + M
Jump to vicinity of target (During Game Play) - LEFT SHIFT + 8
Match velocity with target (During Game Play) - LEFT SHIFT + 9
Destroy targeted ship (During Game Play) - LEFT SHIFT + 0
Invincibility (During Game Play) - LEFT SHIFT + I
Instant repair (During Game Play) - LEFT SHIFT + N
Instant mission win (During Game Play) - LEFT SHIFT + W
Show all reachable planets and moons as waypoints (During Game Play) - LEFT SHIFT + G
Jump to current Lagrange point destination (During Game Play) - LEFT SHIFT + J