Sry.There r no cheats for ghost squad.U have to do it the hard way.I searched but no
cheats.

Heres a hint.
If u unlock the shotgun,keep using it because u can get double hit with it and way easier
to use but not to well on rescue missions.

at main menu bababzczbaabbzczczzccbac

you've got to do your self complete missions over and over again till mission 1,2
and 3 are lvl 20 and you shouls have most costumes and most guns, thank you!