Level: Assault on Cheng Du
Side: Shu
How to: The extraordinary thing about this level is the fact that you start without the radar, which is gay if you completely defend on the radar to find yourself around. Anyway, try to get to Pang Tong (he is a natural general in this level) and protect him. If you don't, he might either get killed, or (worse) he dies by default. To prevent this fate, keep him alive or kill the boss REALLY fast.
Other Ways to unlock him:
Use this code to unlock every officer: R2, R2, R2, L1, Triangle, L2, L2, L2, R1 , Square
OR:
Use this code to unlock every Shu officer: L1, Square, Triangle, R2, L1, L2, L2, R1, Square, L1