Gravity Bone, Thirty Flights of Loving and Quadrilateral Cowboy code open

Blendo Games Company opened source code first person quests Gravity Bone (2008), Thirty Flights of Loving (2012) and Cowboy Quadrilateral (2016). Gravity Bone и Thirty Flights of Loving open under the GPLv2 license, and Cowboy Quadrilateral under GPLv3. Game assets such as images, models, textures, and sounds remain proprietary. Games are written in C/C++, use the engine idTech4 or idTech2 and support running on Linux, Windows and macOS.

Source: opennet.ru