I've heard of NetHack a few times down the years but never realised what it was - a descendant of Hack, which is a clone of Rogue. Oh. Ohhhh. Oh this should be interesting then...
What's more interesting is that NetHack has been around in one form or another since 1987 and it is still getting updated with new content and mechanics, with the last release, version 3.6.0, coming as recently as December 2015.
Advancing technology doesn't tend to let that happen, especially in gaming, and so I'm going to take full advantage of it and play version 3.6.0 (mostly because I can't get version 1.3d going yet, but don't tell anybody that).