John Romero Reveals Unofficial PC DOS Port Of ‘Super Mario Bros 3’
Mehr dazu in Verbindung mit Commander Keen.

This was a 12 frame improvement over my previous record, which itself was a 4 frame improvement over Blubbler's time.
I incorporated the final timesave (among things that humans have actually done before) into this run, which was a faster way of doing level 4-2. This trick saves 21 frames, or 0.35 seconds. With this, the run was tied with the "human sum of best" going into 8-4, to the frame. To give an idea of how hard this trick is (for me at least), I've gotten it 3 times in the last 300-400 attempts.
Unfortunately, this wasn't a great 8-4. I went a couple of a pixels too far in the turnaround room, similar to what I did in my previous record. I had a bad water section - I touched the floor under the firebar in the middle, and I touched the floor a bit too early at the water exit.
This run makes the category significantly harder, because any contender must now do fast 4-2 AND the optimal bullet bill glitch to have a shot. But the category is still alive due to my mistakes in 8-4. andrewg, Kosmicd12 and Blubbler all have the ability to best this time.