This was an experiment playing with different things such as map streaming, maintaining real-time visibility lists, and dealing with very large maps with a large amount of active entities.
There might be some half-useful stuff in the node part (such as the code dealing with visibility lists).
Tilesets borrowed from https://github.com/cvasseng/craftonauts
First install dependencies: npm install
Run with node bin/leikr-srv defaults to port 7523, so check out http://127.0.0.1:7523 once it's running.
MIT.