ANNO - ANNO is a city-building and economic simulation video game series, with real-time strategy elements.
VRChat - Create and play in virtual worlds with others
Stronghold - Stronghold Crusader is a RTS game from the series from Stronghold.
Spatial - Collaborate from anywhere in AR
The Settlers Online - The Settlers is a free web browser based strategy game along with a gameplay that drops anywhere between Age of Empires and the online strategy style.
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.