I discovered a code for the last level on rebel assault II it is, x o / o x x
easy level - X O X O X TRI medium level - X SQU TRI TRI X TRI hard level - X O SQU TRI X TRI t=triangle s=square c=circle x=if you have to ask you will never know!! :-) Invulnerability::t,s,s,t,s,x Level Skip::t,t,c,t,s,s, Master Code::x,t,t,s,x,t(I don't suggest it) The Credits- With the Cantina Waltz ::t,t,c,t,s,s(Same as level skip)