Key points
General information
HitmanContracts.ini
DefaultScene=mainmenu.gms
0x000020C0
0x000000C0
h3.7z
h3.ini
Notes
<path-to-game>\HitmanContracts.ini
Window 1
StartUpperPos 2,2
StartUpperPos 0,0
DrawDll RenderD3D.dll
DrawDll RenderOpenGL.dll
Some users reported that this can be fixed by lowering the "post filter" that is for modern graphics cards.
Update your drivers.
Try to mute the in-game music -some users have reported this fixed their problem.
Try turning off post filtering.
Disable EAX in sound options.
~/.steam/steam/userdata/<user-id>/247430/