From The Cutting Room Floor
XX Mission is a standard shoot 'em up with no stand-out features. It might have been more interesting with an additional X.
<cheat desc="Game Credits"> <script state="on"> <action>maincpu.pb@E146=01</action> </script> <script state="off"> <action>maincpu.pb@E146=00</action> </script> </cheat>
Not content with having just one set of hidden credits, another is stored in the sub-CPU starting at 0x00FC:
Music,effect and Produce By T.fujisawa Software By S.Satoh Desing By A.tsunoda and T.fujisawa 1986 UPL Limited !
(XX Source: Original TCRF research)