DoomRL was one of my faves https://drl.chaosforge.org/

It’s spiritual successor, Jupiter Hell, doesn’t have terminal support yet, but it’s coming up!

They both have 10/10 soundtracks too

This might be cheating, because you already said Nethack, buuuut: Dungeon Crawl Stone Soup

there is a nice multiplayer tron we played in our company…

http://sshtron.zachlatta.com/

I created netris, a terminal based Tetris clone:

ssh netris.rocketnine.space

https://code.rocketnine.space/tslocum/netris

Back in the day there was a great star trek like game for DOS that was all ASCII chars. You played some klingon like captain and had to expand the empire. Wish I remembered the name.