I've got to add to this list;
Some already mentioned Bruce Lee, which I abosolutely loved as a kid. Never could beat it the second time through.
Racing Destruction Set! There was a retro remake someone was working on at one point, but then he just said he was going to stop it and wasn't going to open source it 'cause he MAY pick it up again...
Jumpan and Jumpman Jr. Awesome games, though somehow the game let my brother cheat...
An updated version of Lucifer's Realm would be killer (though I think you'd want this to be AGA, since it's just a graphical text adventure. If you want to try this game out on the Atari 8-bit, make sure you're emulating an old 800, or the 800XL using translator (it works but some of the pictures are black without this).
Those are the simpler ones.
If anyone wanted to take some stuff and port or reverse engineer, recreate whatever you call it, I think it'd be fantastic if someone did this to Phatansie 2 (1 and 3 came out for the Amiga, but 2 never did, though it came out for the Atari ST), and Ultima 1 and 2 never came out for the Amiga either (2 came out for the ST, 1 didn't come out for either.) That would give us Ultimas 1-6, and I believe even 7 works with RTG and Exult.
There was a shooter I used to love called The Tail of Beta Lyrae. Awesome game.
Something along the lines of a Tempest or Defender 2000 like what was on the Jag. Basically an old vector game, transformed to have lots of pretty colors. Major Havoc would be awesome! That only ever came out as an arcade, but I loved the concept (You're in a space ship, you land on bases, hop out of your space ship, find the reactor, blow it up, go back to space ship, go to next stage.) Reminds me of a 2 dimensional Captive.
Anyhow, that should get the blood boiling!
slaapliedje
P.S. I seriously need to learn how to code. Going to start off with Python, and probably move on to doing some C/C++ for the Amiga.