Second Life - Second Life is a virtual reality platform where individuals interact in a virtual world. The software was developed in 2003 by Linden Labs. More than one million people now regularly use the software.
ANNO - ANNO is a city-building and economic simulation video game series, with real-time strategy elements.
Vircadia - Vircadia is an open-source and decentralized real-time VR creation platform for university, enterprise, social, and OpenSim users.
Stronghold - Stronghold Crusader is a RTS game from the series from Stronghold.
VRChat - Create and play in virtual worlds with others
Age of Empires - Age of Empires is the critically acclaimed, award winning Real Time Strategy (RTS) game with a legacy spanning over 20 years and nearly a dozen titles in the franchise.