/vr/ - Retro Games

>Finally played through Plutonia.
I played on UV, but it continuously and used saves because that's just how I enjoy Doom. Maybe I'll try it the tougher way next time.
Even so it was pretty tough, with its love of Revenant armies and mass teleporting in monsters every time you flip a switch or pick up a key.
Now I can say I played through all the official Iwads. Other than the recommendations in the OP, what else is worth a try now?