The game defaults to later versions of DirectX. However, some older systems may not be compatible, leading to strange graphic behaviour when trying to run the game.
Until recently, players could run the game in DX9 mode instead, however support for this version of DirectX has been discontinued. If you were previously using launch parameters to run the game in DX9 mode, try removing the DX9 parameter now and running the game without it.
If you are running into graphic issues, you can instruct Steam to run the game using OpenGL instead:
- In Steam, go to your Library
- Right Click on the game title
- Select Properties
- In the General tab, enter the following in the Launch Options text field:
-disable-postprocess
- Then close.
You can also launch alternative modes using the .bat files which are located in the game's install folder.