Mission 1 - Shoot at least 3 targets.
Mission 2 - Shoot the guy at the right.
Mission 3 - Shoot the two guys in one shot.
Mission 4 - Shoot the guy.
Mission 5 - Shoot the guy that is drinking.
Mission 6 - First shoot the guard after the man passed by him and then shoot the man.
Mission 7 - Shoot the satelite and wait for someone to come andshoot him.
Mission 8 - Shoot the guy behind the glass.
Mission 9 - Shoot the tree, the bottle and then the eletric box.

I will also give the codes for every level:

1:TEACHER
2:TRUSTED
3:BROTHER
4:LEADER
5:SPADES
6:PLANES
7:BROKEN
8:TALKER
9:BOMBER

Hope you like it. :D