Yeah, I think my post is the canonical answer here:
https://intfiction.org/t/issue-running-tads-on-my-pc/56193/8?u=dfabulich
tl;dr:
- TADS has two kinds of
.t3
files, “regular” and “WebUI”- No modern OS/browser can play WebUI TADS 3 files in 2022
- Despite that, Parchment can play regular non-WebUI
.t3
files on iplayif.com- I’ve updated IFDB’s File Formats page to explain that “TADS 3 Web” games are unplayable, but still link to HTML TADS, for legacy use