I'm making a browser-based MMO experience of sorts for the 1999 Dreamcast game Shenmue - it's still pretty rough around the edges but people who like the game have liked it so far:

https://www.newyokosuka.com/

I'm also close to finishing an browser-based client for the MMOFPS Planetside:

https://terrasunder.net/play/

I'm getting reports of performance issues for TerraSunder from a couple people so if you run into them, submitting a performance report in the settings would help me a lot!

I have some other cool projects listed on my site here, including a browser-based version of EverQuest that plays itself: https://brynnbateman.com/