You will now have Super Rapid-Fire for your Mini-guns (never runs out).
At the Options menu, press: Y A Y A Y A
You will now have a special ''Level Select'' Option.
At the Options menu, press: Z Z Z C Y X
1/14/2003
Hidden Level
In Mission 1, Phase 2, go south after you complete your objectives. Here you'll find a deadend canyon with an alternate exit. Take it to enter a bonus underwater mission.