So, i used to speedrun a small serious sam game, the greek encounter, but i never submitted a run, but now that i have revolution, tfe, and tse i decided to start running again. I did a 43 second run of the first tfe level on revolution, but then i saw that the other runs were somehow going very very fast. How is that possible? Any answer on how to do this would be appricated!

The fast runs are actually using split screen with one player, where you can enable mutators.