Yeah, I'm sure Tiger recycled games sometimes. Another example is Heavy Barrel and Terminator. It's not as bad as Elektronika's dozen of egg game clones though.

Apollo 13 and Robocop 2 are added and working.
I kept going game over very quickly on the 2nd level of Apollo 13, so I went looking for a bad bit in the ROM but didn't find any. It turns out the game is just very confusing to play and it's working fine.

external artwork here: http://tsk-tsk.net/net/extart/

[Linked Image from i.imgur.com]