1. Choose "Secrets" to open the Secrets Menu.

2. The menu displays the number of Golden Starships needed to unlock each Secret Map.

3. Secret Map 1 - Explore the Swamp Shack. Eliminate all enemies.

4. Secret Map 2 - Destroy the Alien Patrol Ships.

5. Secret Map 3 - Explore the ruins, and try to stay alive.

6. Secret Map 4 - Concept Art Gallery

7. Secret Map 5 - Explore the alien cloning facility, and eliminate all enemies.

8. Secret Map 6 - Character Model Gallery