This was (and still is, for a little while) StoryNexus:
On StoryNexus, everyone could build their own game - but it’s no longer supported. Failbetter nearly went bankrupt a few years ago and decided to put SN in indefinite maintenance mode. This, coupled with the end of monetization for developers, meant that many games got stuck mid-development. But they’re all still online and are now entirely free-to-play with unlimited actions! Many of them are very very interesting and you should think about spending some of your time exploring them - especially now that The End ™ has been signalled and time is really running out!
official, completed Failbetter releases:
The Silver Tree - Historical - Info - FL prequel, official part of Neathy lore!
The Night Circus - Fantasy - Info - Em Short review
Cabinet Noir - Historical - Info - Gamezebo review
polished games:
Zero Summer - Post-Apocalyptic - Info - Em Short review pt.1 / pt.2
Below - Fantasy - Info - Em Short review
Lethophobia - Drama/Fantasy - Info - Em Short review
The Thirst Frontier - Science-Fiction - Info
Rat Sending Simulator 2kXX - Comedy - Info
The Annwn Simulation 1985 - Fantasy - Info
Locked Code - Archaeology - my review
Winterstrike - Science-Fiction - Em Short review - my review
Brexit - Comedy - Info
unfinished, but still recommended:
Cryptic Stitching - Fantasy - Info
Knightly Tales - Fantasy - Info
Maelstrom - Fantasy - Info
Magic Sushi - because it’s just incredibly sweet! :)
Shadows over Santharia - Fantasy - Info
Samsara - Historical - Em Short review - my review