OpenJam’s rc-servers is a collection of re-implemented Robocraft web services. Robocraft was an online vehicle combat game where you build your own vehicle (robot) out of blocks and then fight others’ vehicles in a few different game modes. The official servers were shut down by FreeJam in January 2025.
These servers are intended for self-hosting but I’ve also got a reference instance running. There are also other instances running in Japan and the USA. I’ve been having a fun time reverse-engineering the expected server behaviour from the client as well as figuring out the niche communication protocols.
Is this different than robocraft 2015 project?
Yes, RC15 is closed-source and targets a heavily modified 2015 version of the game. This is open source and targets the latest version of the game and is probably compatible with versions of the game that are slightly older than the latest version, but not as old as 2015.