Our game Reaction is on Steam Greenlight. It's a remake of Action Quake 2 on a highly modified Quake3 engine. We've been working on the game for over a decade now and have made massive improvements to the engine to support PBR, parallax and cascade shadowing. We've also developed our own custom renderer "Rend2" for the engine. The game itself is open source and free to play. If anyone wants to show some support and vote for us on greenlight or help contribute maps to the game feel free!

steamcommunity.com...es/filedetails/

Thanks everyone!