SeriousSamClassic-VK is open source game engine version developed by Croteam for Serious Sam Classic with Vulkan support, but it should work on (or be easily portable to) any system that supports Vulkan and SDL2.Note that while the Serious-Engine source code has been released under GPL, you...

SeriousSamClassic is open source game engine version developed by Croteam for Serious Sam Classic, but it should work on (or be easily portable to) any system that supports OpenGL 1.3 and SDL2.Note that while the Serious-Engine source code has been released under GPL, you still need to legally...