Cheat Mode:
Pause game play and enter one of the following codes to activate the corresponding cheat function. Note: Some codes can only be enabled in the v1.1 patch.

Effect	Code
Full armor, shields, energy, weapons, plasma bombs and ammo	nsopta
Toggle ultra-shields until end of level.	nsbagwan
Full energy	nse
Toggle maneuvering jets	nsbjipp
Illuminate surfaces	nsoptl
Toggle rapid shield regeneration	nsblaster
Toggle rapid energy regeneration	nshorsley
Faster weapons firing	nsdiebesterds
Valid code that has no effect	nsopts
Toggle air friction	nsfricoff
Death skill level	nsdeath
Hover at minimum throttle	nshalt
Full map	nsoptm
Level select	nswarp<episode><level>
Debug mode	nsdebug

Special opponents:
A special birthday mode, with cows, monkeys and other animals, may be enabled by setting the system date to make one of the following programmer birthdays: March 12, May 16, August 28, or October 2. This mode may also be enabled by activating all the switches at the bottom of the episode selection screen and darkening the button.