What about a look at the games that could run under Unreal's Open 1998 engine?
Does not need much to run as it has built in GL and d3d. https://ci.appveyor.com/project/BearIvan/unrealengine/build/job/2sn8pbwx75mkon7d
https://github.com/RedPandaProjects/UnrealEngine
I don't think there is much...