Changelog for Patch 1.1 multiplayer update (added 02 October 2017):

- Online multiplayer has been brought back using GOG Galaxy
- Added cross-play between GOG and Steam users

Changelog for Multiplayer Patch Update (added 03 January 2018):

Minor bug fixes and optimized performance, the most important fixes are:
- Lobby functionality has been improved
- Steam usernames should now display correctly
- Ping calculations are more accurate