https://app.dev-esc.com/new_game/ - an online escape room for developer teams. I aimed to make a team-building experience that was a bit different. unashamedly geeky: you’ll need puzzling and some coding to solve the challenges.
Fully remote for teams of 1-8ish; free to explore. Requires a computer, although you can explore on mobile/tablet.
Originally it was free to play - I got a fair few plays off my HN post, now I have a trickle of paying customers.
Use code hackernews22 for a 40% discount
Original submission at https://news.ycombinator.com/item?id=28579191