A 2D multiplayer sandbox game that I've spent many hours playing

I bought it for $6.69USD in 2023 on the Steam store. As of 2025 it is still considered Early Access, but will release 1.0 on 2025-October-15.

Has a dedicated server app for Windows and Linux. I played this game with friends across the US, and running the dedicated server located between us in Chicago made the game much more enjoyable for all. The official docs have a guide to running the server app on Linux, but I instead opted to run the server inside a docker container using this image.