>>715651541
ECWolf source port for vanilla OR Brutal Wolfenstein 7.0 for a Doom-style remaster are necessities. Both give the game modern resolution, framerate, and controls.
https://maniacsvault.net/ecwolf/download.php
https://www.moddb.com/mods/brutal-wolfenstein-3d

There's also some great mappack mods like Coffee Break and Castle Totenkopf SDL that also add in new weapons and enemy closet triggers for more sophisticated encounters with new enemies.