there is a update where in multiplayer glitch has been replaced by void if someone is left behind the group
other glitch was made if a room has been generated wrong
so you can get it in single player(as well as in multi) only but its very rare
PEOPLE WHO PLAY DOORS 1 PLAYER BECAUSE THEY THINK THEY CAN BEAT IT; PEOPLE WHO PLAY DOORS 1 PLAYER BECAUSE THEY DON’T LIKE THE OTHER PEOPLE WHO WAIT FOR THEM TO DO ALL THE STUFF; PEOPLE WHO PLAY DOORS 1 PLAYER BECAUSE THEY DON’T WANT TO GET THE GLITCH