I found some cheat codes for the PS3
fu11yst0cked unlocks all Single Player missions (and gives 3 Janus Emblems in all levels)
Quimbecile Unlocks all M-16 Ops and gives 4 star rating to all in Multiplayer
pa1ntth3townr3d Unlock classic conflict and every character in Multiplayer
wr1t1ng1s0nth3wa11 Unlocks Paintball mode in Multiplayer only
las3r3ras3r Unlocks Black Moonraker skin in Multiplayer only
f11ypr2load3ed Unlocks Tag and invisibility in Multiplayer only