Never heard of this before, kinda amazing maybe?: a turn-based, so-roguelike-it's-text-display-compatible post-apocalyptic survival game.
cataclysmdda.orgCataclysm: Dark Days AheadOfficial homepage of Cataclysm: Dark Days Ahead open source turn-based survival RPG development project. Hosts downloads of game and links to community sites...
It's possible that it's also the first free open-source game ever to be interesting enough that I forgot about that part when writing the post