Board Thread:Unanswered Questions/@comment-25069258-20150218194512/@comment-1824272-20150218195757

Pre-Steamworks, Assault Horizon simply used the Games for Windows LIVE keyboard input because it was ported easily from Xbox 360 to PC using GFWL. But when they removed GFWL, they didn't add keyboard input to the game. So, there is no possible way to do it, not unless they patch keyboard input into the game at some point in the future.