Note: this project is currently a young startup and is largly incomplete. It may not run as-is and the development team will not make any public statments about it untill a more or less functional official release is made.
Coup is an open Game Engine designed to favor performance and visual quality for 3D First Person and is meant specifically for high end GPU accelerated desktop applications requiring nex-gen level polycounts, texture resolutions and render effects runing either Windows or Linux/SteamOS. It can be built for mac and other platforms however is not officialy supported.
Coup aims to unify free open development comunitys to create a game engine pipeline that can compete with comercial software alternatives.