Originally Posted by ImmortalA1000
My main point was that sadly the Amiga had some terrible conversions like Outrun or Chase HQ when game engines existed that were just as good as some arcade games.
Outrun is indeed a very good example. Most 'hacks' are indeed new content only like alexh said and not imporvements to the actual engine (which is of course a lot more work). I really can't remember any improved engines for games on the Miggy.