I installed DDay 1.13 and since then every game has only a black screen. The games are running beside that.
No used addons.
Clean install (uninstalling DDay, deleting every leftover folder and reinstalling)
Running the game in windowed mode
Forcing safe resolution (640x480)
Rollback to DDay 1.12.2 fixed the issue.
OS: Windows 8 Pro 64-Bit
GPU: GeForce GTX 780
GPU Driver: 331.82
Mainboard: ASRock P67 Pro3