How to enable co-op monsters?

[MattFright]

I've been wanting to play some maps that support co-op monster placement, but in singleplayer, but i've only seen this done in other sourceports (PRBoom+, Zandronum, etc), and in Zandronum seems to even be able to do it ingame without having to use command line paremeters. I've searched absolutely everywhere i could but i couldn't find a solution for GZDoom (at least not one that doesn't involve command line paremeters, since those are very wonky to use with launchers, i've found), so i was wondering if anyone knows any way to enable co-op monster placement in singleplayer ingame, or through some pk3 that automatically does that? (i also assume ZDL might be easier to do this with than Doom Launcher, but ZDL broke for me for seemingly no reason, though i could be wrong and it's still clunky for this)

[openroadracer]

You can do this in-game; you'll just have to pull up the in-game console.

Start up a regular game and load into your first map, then open the console and enter "map e1m1/map01 coop". That should start you up with co-op monster placements on the difficulty you had just chosen the normal way.

[MattFright]

Hell yeah, much simpler than i expected actually, tysm