"This application requires one of the following versions of the .NET Framework: .NETFramework, Version=v4.0" or "Unhandled exception has occurred in your application. The specified module could not be found."
\Steam\steamapps\common\Batman Arkham City\Binaries\redist
If the game still won't launch, use the installers provided within the game's local files. Steam Community Navigate to your game directory: Steam\steamapps\common\Batman Arkham City GOTY\Setup Run the following as an Administrator dotnetfx35.exe (The .NET 3.5 installer). DxRedist\DXSETUP.exe (To repair DirectX components). Steam Community 3. Additional Fixes batman arkham city .net framework error windows 10
Guide :: Microsoft .NET Framework Error on Windows 10 / 11 FIX
Download the offline installer from Microsoft: (run as admin). "This application requires one of the following versions
Since the game was built for older operating systems, modern Windows optimizations can sometimes trigger runtime errors.
Remember: Batman: Arkham City is perfectly capable of running on Windows 10 at 4K resolution with 60+ FPS. The .NET error is merely a sign of the game’s age, not a fatal flaw. By forcing Windows to acknowledge its legacy .NET 3.5 framework or bypassing the broken launcher, you can once again glide through the rain-soaked streets of the Arkham City prison district. DxRedist\DXSETUP
Check the Steam Community Hub for Arkham City or the PC Gaming Wiki (PCGamingWiki) for user-submitted hotfixes specific to your version (GOTY vs. Original).