Skeleton Neon
     In Neon's Profile, type 'ziocleto'.

Various Cheats
     At  the Main Menu, hold Shift and type 'mensaaaa' to enable cheat
mode. Now enter any of the following

"Codes":                          Code Effect
G                                 God Mode 
Left Shift + Left Ctrl + A        Level Skip 
Left Shift + Left Ctrl + R        Level Restart 
Left Shift + Left Ctrl + C        Continue Mission if Failed