The 1.1 update includes Steam Workshop integration, two new difficulty levels, and UI improvements. With Steam Workshop integration, players can easily share their ship designs and custom factions with other Galactic Civilizations III players. There are already over 400 new ship designs and custom factions available for download today on Steam Workshop!
This update also includes custom map support for multiplayer games, pirates in multiplayer, and a ton of other improvements and fixes for the game. You can see the full changelog here: https://forums.galciv3.com/467453