ADOM had a fancy re-release on Steam recently! It just showed up in my Steam queue. Check out Dungeon Crawl Stone Soup. Feels like a much more modern Nethack,

ADOM had a fancy re-release on Steam recently! It just showed up in my Steam queue. Check out Dungeon Crawl Stone Soup. Feels like a much more modern Nethack, with convenience features (`o` autoexplore, `tab` autofight, etc.) and less of a focus on one-and-done intrinsic immunities in favor of tradeoffs ("this armor comes with cold resistance but vulnerability to fire"). For more of an "explore the world" feeling, Caves of Qud is on Steam and has a ton of depth.