If you're encountering issues with launching Sniper Elite V2, make sure everything installed smoothly.
Aside from verifying your game cache and checking your connection with Steam, you may also need to manually run secondary installers required by this game.
Exit Steam entirely.
Browse to your Sniper Elite V2 installation folder (Usually C:\Program files\Steam\Steamapps\common\sniper elite v2\)
Run the following installers:
...\Steamapps\common\sniper elite v2\redist\DirectX\DXSETUP.exe
...\Steamapps\common\sniper elite v2\redist\DllCheck\Dllcheck.exe
...\Steamapps\common\sniper elite v2\redist\VC\vcredist_x86.exe
Reboot your computer and test any issues again. If the issue persists, contact Sniper Elite V2 support.