A game engine with an emphasis on real-time cutting-edge solutions
Includes the boilerplate code for a GenLayer use case implementation
The Oldschool Runescape API wrapper that does more
A Game Server Skeleton in golang
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Amazon Lumberyard is a free AAA game engine
A cross platform Lua based game engine
BungeeCord, the 6th in a generation of server portal suites
Simple meta-server for locating other multiplayer servers
Free Android 2D OpenGL Game Engine