Ring4 Meeting - Dead simple video conferencing - free, in browser
ANNO - ANNO is a city-building and economic simulation video game series, with real-time strategy elements.
Stork.ai - AI-Based Collaboration for Hybrid Teams. Rich media messaging, advanced video and voice conferencing, auto-transcribing and screen sharing. Serendipitous meetings at the water-cooler with your human and AI teammates.
Stronghold - Stronghold Crusader is a RTS game from the series from Stronghold.
openmeet - Account free video conferencing with a rooms component that lets you use VC within a physical meeting room. The server can also be hosted in your own cloud for extra privacy/security.
STAR WARS Galactic Battlegrounds Saga - STAR WARS Galactic Battlegrounds Saga is an Action, Real-time Strategy, Combat, and Multiplayer video game created by Ensemble Studios.