OpenXcom Co-op Mod v1.0.0 – Full Release (Linux)

Changelog 2025/12/30

1. Improved research sync, the other player now gets the same research popup, and research projects update instantly without needing to reload a save.
2. Added base facility sync, when one player builds or removes a facility, the change updates instantly for the other player when viewing that base. No need to go to the Geoscape and back to see the changes.
3. Alien base markers are now synced on the Geoscape.
4. Fixed mission sites, so they should no longer disappear for the other player (syncs when both players are in Geoscape).
5. If a player shoots down a UFO over water, it is now destroyed on impact and will not crash and create a mission.
6. Fixed a Battlescape sync issue where throwing an item could sometimes end up on the wrong tile.
7. Improved tile damage sync so tiles like walls and doors now get destroyed in exactly the same way on both players. Before, if you fired a rocket and it hit a wall, the damage could be different for the other player, would not sync, and could break pathfinding.
8. Fixed an issue where a soldier sometimes would not shoot while berserk.
9. Fixed soldiers disappearing in the new battle menu after ending a mission.
10. If you lose a base defense mission, it no longer counts the other player’s base, so the game will not continue if you lose your last base.
11. Units that are on fire should now sync in Battlescape, tested with The X-Com Files.
12. Fixed Battlescape sync issues when a unit was turning or opening a door.
13. Added multiplayer option "Enable XCOM Equipment for Aliens in PvP".
14. Other small fixes and improvements.