In game cheats
     Press start while choosing a mission and choose Extras and choose
Enter Secret Code

Password:                                   Effect:
Cannonbolt; Cannonbolt; 4arms; Heatblast    Dark Heroes
Wildvine, Fourarms, Heatblast, Cannonbolt   DNA Force
XLR8 ;Heatblast; Wildvine; 4Arms            Invincibility
Cannonbolt,heatblast,wildvine,4arms         Master Control
wildvine,4arms,heatblast,wildvine           Unlock alien forms
Cannonblot; Heatblast; 4arms; Heatblast     Unlock ALL Combos
Heatblast; XLR8; XLR8; Cannonblot           Unlock All Locations on Map