infeeeee@lemm.ee 10 months ago
With Goldberg Emulator you can play a lot of online games on LAN from Steam:
Steam emulator for GNU/Linux and Windows that emulates steam online features. Lets you play games that use the steam multiplayer apis on a LAN without steam or an internet connection.
https://mr_goldberg.gitlab.io/goldberg_emulator/
I used it a long time ago, but it always worked flawlessly.