While driving around using the GPS system will get you some characters, the coolest ones have to be earned through the game. Or... through these cheats. A forum member from MGCN called SHADOW.EXE has uncovered passwords for what could be every unique character in the game. Check it out:HUNTER-N is NULL
LQ.N2 is PYTHON
JUNKER is CUNNINGHAM
ERBE is GENE
PK +ESP is URSULA (can't be got with ELISA at the same time)
THE-L is ELISA (can't be got with URSULA at the same time)
E.APPLE is EVA
PM-EMS is PARAMEDIC
DARPA-1 is SIGHT
R.R.R. is OCELOT
1+2-3 is ZERO
SATURNV is SOKOLOV
IVN =RV is RAIKOV
T.F-ACID is TELIKO
MGA2VE is VENUS
! TRAUMER is GAKO
[Via 1UP]
