Updated SDL to the latest version (2.0.12). This version has some gamepad compatibility fixes, performance improvements and general bug fixes.
Added an option to run the game at 30 FPS. Normally it tries to run at 60, but if Blackshift can't manage 60 on your machine, this option will at least give you a consistent frame rate.
Fixed a bug where pressing Esc during the end credits could lock up the game.
If you run in windowed mode and resize the window, the game now remembers what size the window was next time you run it.
Changed how the game deals with lag: there is now a limit to how many frames it will skip.
Update 2.3.5 Released · Blackshift patch notes · SteamPeaks