I created a new autosplitter for the game on Steam. I tested it up to the end of Mission 04 and also had Frenchie test it. You may have to go in to Mission 01 first, resign back to the main menu, then actually start the run for it to start splitting correctly. Had some weirdness with it not working the first time for some reason.

If there are other bugs, let me know! :)

Does anyone know if the autosplitter works in coop?