
1) Free game engine
Found on
https://www.crosswordclues.com/clue/opensimulator

OpenSimulator is an open-source server platform for hosting virtual worlds and the Metaverse. It is compatible with the client for Second Life and can host alternative worlds with differing feature sets with multiple protocols. ==Features== OpenSimulator is written in C# and is designed to be easily expanded through the use of plugin modules. Open...
Found on
http://en.wikipedia.org/wiki/OpenSimulator
No exact match found.