Fixes & Performance

KF2 Black Screen With Sound: the -dx10 Launch Option Fix

If Killing Floor 2 launches, the menu music or in-game sound plays, but the window stays black, one early community workaround is to force DirectX 10 through a Steam launch option. This is a short fix from the early days of the game, and it comes with a visible trade-off.

Warning first

The author states that this method disables animations. Expect no running, jumping and similar character animations while the option is active. Treat it as a way to get the game running, not as a permanent setting.

Steps

  1. In your Steam library, right-click Killing Floor 2.
  2. Choose Properties.
  3. Click "Set Launch Options...".
  4. Type -dx10.
  5. Press OK.
  6. Press Close.
  7. Launch Killing Floor 2.

To undo it, open the same field again and clear the text.

The original guide also links a video walkthrough of the same steps.

If it does not help

Other causes of a black screen with working audio exist; see the related pages black screen with audio and black screen with music fix.

FAQ

What does -dx10 do for the black screen?
It forces Killing Floor 2 to start in DirectX 10 mode, which gets around the black screen on some setups where the game runs and plays sound but shows no picture.
Are there downsides to running with -dx10?
Yes. The original guide warns that this mode disables animations, so there are no running, jumping and similar animations.