DRSP, which stands for decentralized r/place (our inspiration), is a real-time massive multiplayer decentralized persistent virtual world.
There is no central server behind this game. You dynamically load small chunks of a gigantic map as you move around, and sync updates about the world state only with the other people in those chunks.
It's built with IPFS pubsub room and delta-crdts. CRDTs are Confilct-free Replicated Data Types, and are the reason everyone on DRSP ends up with the same world-state no matter what order updates are recieved in.
Source code: GitHub