After uninstalling TriDef 3D, I was able to launch Far Cry 3 for a single time in DX9 mode. I then switched to DX11 and the game would start without Rift support. After changing the setting back to DX9, I’m stuck with the initial load screen again. The game displays the load screen in Rift mode and then switches to a standard mode for half a second. It changes back to Rift-mode and then freezes.