EmptyEpsilon is used for a couple of interesting large scale or commercial immersive experiences, including the Odysseus larp and Bridge Command. I’ve written up both:

Bridge Command: https://mssv.net/2024/07/31/bridge-command/

Odysseus larp: https://mssv.net/2025/03/19/the-collective-ambition-behind-o...

There’s a discussion on HN about the latter, too: https://news.ycombinator.com/item?id=43414992