Steam force closes the game.
So whenever I start the game up, it will get to load almost the whole way in and then Steam will close it, saying that it is trying to run with optional parameter -force-d3d9. Any way to fix this? I tried verifying my install and it's fine, and my actual launch parameters are untouched.
We have seen issues like this before which were resolved by simply rebooting the system.
Did you reboot since then and the issue does still persist?