Open source game engine version developed by Croteam for Serious Sam Classic with Vulkan support (Windows, Linux, FreeBSD, Raspberry Pi 4).
Based on https://github.com/sultim-t/Serious-Engine-Vk and linux port https://github.com/icculus/Serious-Engine
Source code: https://github.com/tx00100xt/SeriousSamClassic-VK
Open source game engine version developed by Croteam for Serious Sam Classic (Windows, Linux, FreeBSD, Raspberry Pi 4).
Based on https://github.com/Croteam-official/Serious-Engine and linux port https://github.com/icculus/Serious-Engine
Source code: https://github.com/tx00100xt/SeriousSamClassic
Note that while the Serious-Engine source code has been released under GPL, you still need to legally own the game and provide Serious Sam Classic The First Encounter and Serious Sam Classic The Second Encounter the game data to play.