by Rachael » Fri Oct 15, 2021 7:25 pm
The only way this would be feasible is if the player had limited lives in multiplayer which is antithetic to the way Doom functions since it was written in a way from the very beginning that you are allowed unlimited lives. So the death would have to be permanent, at least, until every player dies - and then the level can restart with every player revived.
Zandronum implements this natively (it's called Survival Coop), but this is also possible with GZDoom as well by transforming the player into an object that is unable to interact with the world after the player is revived (such as a spectator, which will have to be coded manually, but it is possible through ZScript).
I do not know of yet any mods that implement this standalone but I know of at least one TC that has the mechanics for this - the Five Nights At Freddy's Doom Remake series. However, it does not implement a spectator mode - it just kills the player if they try to respawn.