Serious Sam Fusion 2017 is the big update to Croteam classics with right now being Serious Sam HD: The First Encounter while The Second Encounter and Serious Sam : BFE are still in the works. There is VR support for all of these games as well as Vulkan rendering support.
The games are also 64-bit among other improvements with the big engine upgrade.
I'll share some test results in a follow-up article shortly.
The minimum Linux requirements are a GeForce 8600/9600 or AMD HD 2600/3600 but they recommend at least a GeForce GTX 1070, particularly if using the VR mode. More details on Steam.