The 'dungeon crawl' experience without the need for a GM or party, yet also a video game that does not require
shiny graphics to impress its players.
(You'll need them; this game is heavy)
Play it online:
1. Activate the telnet client on your computer (windows) or download a telnet client. Telnet is
used for MUDs as well as nethack.
2. Connect to (or open:) alt.nethack.org
3. Refer to this website
I know very little about Angband aside from that character creation is more complicated than NetHack.
It is larger and longer and supposedly more about combat than NetHack, which takes an exploration
and resources bend.
Caves of Qud
(I've never played this one.)