Chili Con Carnage cheats and cheat codes for Sony PSP

Become invincible:
Enter ERNESTO as a profile name to be invincible. 

During a single player mode mission, you can press Select and pass 
the mission with a "Gold" rank. 

During the Challenge match, you can press Select and pass one part 
of that match. 

Unlock additional playable characters and maps in multi-player mode:
On certain levels and challenges after obtaining a "Bronze" or higher, 
"Silver" or higher, or "Gold" rank.