Prior to 3.1.x the dat subdirectory didn't exist yet but data.base was present somewhere, possibly in the src subdirectory instead. I don't know whether it goes as far back as hack 1.x or even nethack 2.x. The source code for a bunch of old versions is present at https://nethackwiki.com/ but I'm not sure whether the data files are all there too. The source code for the most recent released version (3.6.7) is... Source: about 1 year ago

I am not sure what extra benefits the Steam version has, but the game is available for free either as download on nethack.org, or to play online at something like alt.org/nethack or hardfought.org. Source: about 1 year ago

You don't even need two people to play D&D, Nethack is great! Source: about 1 year ago

I've always been fond of the last quote on nethack.org. Source: about 1 year ago

It was discussed here last fall, when the home page for nethack.org was updated to mention it. The blurb includes a few other tiny screen shots and says the exhibit is scheduled to be open until mid-July. Source: over 1 year ago

Downwell is an awesome game. It's a quick game to play when you have some time to kill. It's not an investment at all. Source: over 1 year ago

{ "id": 0, "name": "Downwell", "description": "Downwell is a curious game about a young person venturing down a well in search of untold treasures with only his Gunboots to protect him.", "website": "https://downwellgame.com/", "subreddit": "/r/Downwell", "center": [ 1343.5, 55.5 ], "path": [ [ 1342.5, 50.5 ], [ ... Source: about 2 years ago