This is a 2 players movie of Altered Beast, 28.26 seconds (1696 frames) faster than Dan's 1 player version.

It abuses a programming error so that you only need to see the transformation once per level (normally, you need to see it twice on 2 players). Without this alone, a 2 player run would be about 15 seconds slower (not counting other improvements) compared to a 1 player run, because of having to see both players transform.

adelikat: The verdict is "accepted for publication". The movie should have used the hardest difficulty setting by using B+Start at the title screen. An improved movie that does not use this will be rejected. As a result, an "improved" movie will be longer than this submission.

Also, I am encoding this movie.