These days, we tend to expect multi-format releases to have if not complete parity, then certainly as close an experience as possible to one another.
That wasn’t always the case, though, and I can think of few better examples of this that Adventure International’s The Eliminator, which somehow became an entirely different game between its original TRS-80 incarnation and its Atari 8-bit “port” by Steve Coleman.
It’s a fun little blast ’em up, though, so I’m not mad or anything; I just thought it was interesting!
Atari A to Z 