XCOM - TTS

As of my last knowledge update in September 2021, there was no official XCOM game or expansion known as "XCOM - TTS." XCOM games typically refer to the turn-based tactical strategy games like "XCOM: Enemy Unknown" and "XCOM 2." "TTS" often stands for "Tabletop Simulator," a platform for playing board games and tabletop games in a digital environment, but I'm not aware of any official XCOM game released specifically for Tabletop Simulator.

Please check the latest sources and announcements for any new developments or unofficial content that may have emerged since my last update in September 2021. There might have been fan-created XCOM content for Tabletop Simulator or other tabletop gaming platforms.