Star Control 3

Eternal Life
When playing Hyper-Melee or the full game, press Alt-F9 to restore player 1 to full life or Alt-F10 to restore player 2 to full life.

Warning: The planet and asteroids will vanish if you use this code.

Free Pkunk Crew
This is simple cheat, but save the game before trying. Take all the men off of a Pkunk ship but 1. When you go into battle with the ship, you have a full crew of Pkunk for that ship.

Make the Utwig work at 250%
After the Ultron is taken back from the Vux and has been repaired, but still isn't working right, go to an Utwig colony. Tell the Utwigs that you fixed their Ultron. After it's tried and the Ultron still isn't working, tell them you'll try to fix it. The colony's work will be improved by 10 to 15 percent. Keep doing this until you get near 250%. DO NOT GO OVER 255%, it will reset to a low number.

Precurser Artifacts in Hyper Melee
To get player 1 Artifacts, hold Alt + F9. The ships will re-warp, and player 1 will have a larger crew, more battery, etc. Hold Alt + F10 for player 2.

Use Any Ship in Hyper Melee Mode
To choose any ships in Hyper Melee mode, simply select the computer opponents before choosing human players.