** Thothie is the original author of this located here. That post is simply being re-made to ensure the post is not edited in the future. Quick summary of some of the more common solutions to various issues described in this thread: (none guaranteed to work) • Graphics Glitches/Green Screen of Death: - Add "-nofbo" to launch options - (To do so, right click MSC's entry in your game library, click Properties, and click Launch Options). • Mouse bugs - Option1: Type "m_rawinput 1" in console - Option2: Run in windowed mode - At main menu, Options->Video->Mouse, check Mouse Filter • Combinations of either - At main menu, Options->Video-> - Toggle "Wait for Vertical Sync" - Toggle "Low Video Quality" • Last Resort: - Use one of the various methods described in this thread to roll back Half-Life to a version older than Febuary 2013. - This will, sadly, prevent you from playing on RKS or other Steam Pipe HLDS servers.