Oxygen Not Included's Unity layer on the BRUTAL framework, .NET 10 CoreCLR. On a late-game colony the game runs at up to 13× the original's frame rate
A free, open source C# framework for making games, or your own game engine. Direct access to native APIs and Vulkan, with the low-level libraries around them. The foundation under Kitten Space Agency and RimWorld's Waylith engine.