What are the best/most well known PWADs to FEATURE co-op compatibility?

[Egregor]

I have been playing co-op on a private server with friends, and because they are nervous about co-op compatibility issues with man made levels (been burned too many times with single use doors/teleporters, etc.) they rely on oblige to build co-op maps, but I know there are entire map sets designed with co-op mode in mind, I'm just not sure which ones they are. Who's got a short list they can post? Any and all suggestions welcome, but obviously Cacoward winners and classic/famous sets are preferred, as I want to prove that man-made is as good/better than oblige.

Edited January 27, 2022 by Egregor

[Arrowhead]

Squadron 417 is very old, but very fun.

 

It was one of the earliest WADs to be specifically made for co-op.

 

If I recall correctly, special attention was made in Memento Mori and Memento Mori 2 to be cooperative.

 

Alien Vendetta, Scythe, and I'm sure even the Back to Saturn X series is good for co-op.

 

You might want to take a look at Demonfear, although that one can be a little small.

 

There are a lot of great mapsets that play well in co-op, but there are not very many specifically made for co-op.

 

Hope this helps a little bit.