Enter these codes at the Code Setup screen to unlock missions:

1: BEAST PIT
2: GIMMEMYJETPACK
3: CONVEYORAMA
4: BIGCITYNIGHTS
5: IEATNERFMEAT
6: VOTE4TRELL
7: LOCKUP
8: WHAT A RIOT
9: SHAFTED
10: BIGMOSQUITOS
11: ONEDEADDUG
12: WISHIHADMYSHIP
13: MOSGAMOS
14: TUSKENS R US
15: BIG BAD DRAGON
16: MONTROSSISBAD
17: VOSAISBADDER
18: JANGOISBADDEST