Category for multiplayer
The spawns go from 1 Player - 1x 2 Player - 2x 3-4 Player (N/a) 5-6 Player (N/a) I don't know the spawn rates above 2 player but I heard it from Kyle himself so ¯_(ツ)_/¯
Category Extensions
Category Extensions for Michael's Zombies have been added to Speedrun.com. Here you can find categories that wouldn't fit on the main page. Basically, challenges n'stuff will be here.
Also, you can suggest categories. They might be added if they are
Recent runs
