Force player to quit after a specific map

[saturian1]

Some WADs have only for example 20 maps and it loads default Doom 2's map 21 without any proper ending or info, leaving player confused.

I was thinking if it's possible to "force" a player to stop playing after a specific map, like putting him in blank black room with no way to move or exit? Or just display some message and not load next level at all?

Is there anything like this in ZDoom possible or do I have to just open up SLADE and create dummy empty maps myself?

[ramon.dexter]

You can always override this behavior by duplicating said maps with empty maps and properly ending game thought mapinfo.

So, your wad has 20 playable levels and 10 blank ones to disable playing default maps. The game in properly ended in map20, and since the other maps are replaced, they dont start.

[InsanityBringer]

I mean, this is what MAPINFO is for. Even if the mapset in question is designed for vanilla you can still put in a mapinfo lump to make it end after level 20. In fact you can do that with UMAPINFO these days which work in many extant ports.