Press the 'Left' shift and slowly type "NEM YDID EHT" and press 'Return'. You'll hear a sound. Now 'C' will complete your mission. Also 'Enter' has a few uses: refuel, repair shields & boost weapons.

• Level 1 - NUARIGA - OPERATION BREAKOUT. First, keep destroying mines until your completion percentage is 100%. Then head for the planet. At the planet, follow HOG 334 until you come across 2 generators. Destroy them both and follow the road to the center of the map. Here you will find a radar installation, so destroy it.
• Level 2 - CEPHEUS - OPERATION WIPEOUT - STAGE 1. At the planet, follow HOG 309 until you find a mine head at the end of a road. Destroy it and follow the road to the center of the map. All roads but one have mine heads at the end, so follow them and destroy them all.
• Level 3 - APUS - OPERATION WIPEOUT - STAGE 2. At planet, follow HOG 080 until you find an MCP. Destroy it and follow the roads until you have come across and destroyed 3 tower MCP's. Go to the center of the map, and destroy the last MCP (it is small and has smoke coming from its top).
• Level 4 - MUSCA. Defend your fleet against attacking Rexxons.
• Level 5 - PYXIS - OPERATION BLAST. At planet, follow HOG 321 and destroy the magma gun.
• Level 6 - CETUS. Defend your fleet against attacking Rexxons.
• Level 7 - FORNAX - OPERATION RETALIATOR. Follow HOG 312 and destroy the Rexxon High Command.
• Level 8 - CAELUM. Defend warship Battleaxe against attacking Rexxons.
• Level 9 - CORVUS. Follow HOG 312 to Rexxon Mothership. Fly over the top of the ship, and locate the ION-VENT. Shoot the cobalt at it, and then shoot a laser shot into the vent. The Mothership will blow up. All Rexxons will turn against you. You must avoid them long enough for the game to end.