Virtual War is a SP/MP Fps set in the future. It uses a custom 3D engine by us called "Synapse Engine" - It will feature all the traits of a modern 3D game.
This is the official code repo for Synapse Engine.
The engine is open source, and written in C++. You will require Visual Studio to load/compile and run the solution.
The engine is being geered towards modern FPS and similar types of games.