Minimum System Requirements
Windows
OS:
Windows XP/Vista Processor:
2.4 Ghz Intel Pentium 4 or equivalent RAM:
1 GB RAM (XP)/ 2 GB RAM (Vista) Video card:
Direct X 9.0c compliant video card with 256MB RAM (NVIDIA 6800 or better/ATI X850 or better) Sound card:
DirectX Compatible Sound Card Disk space:
7 GB 
MAC
Fallout 3 is not officially supported on macOS. However, some users have managed to run the game using Windows emulation software or by installing Windows on a separate partition via Boot Camp
Linux
Fallout 3 does not have an official Linux version. Players have used compatibility layers like Steam Play's Proton or Wine to run the game on Linux systems, but performance and compatibility can vary
Recommended System Requirements
Windows
OS:
Windows XP/Vista Processor:
Intel Core 2 Duo processor RAM:
2 GB RAM Video card:
Direct X 9.0c compliant video card with 512MB RAM (NVIDIA 8800 series, ATI 3800) Sound card:
DirectX Compatible Sound Card Disk space:
7 GB MAC
Fallout 3 is not officially supported on macOS. However, some users have managed to run the game using Windows emulation software or by installing Windows on a separate partition via Boot Camp
Linux
Fallout 3 does not have an official Linux version. Players have used compatibility layers like Steam Play's Proton or Wine to run the game on Linux systems, but performance and compatibility can vary
We recommend playing Fallout 3 on a Windows PC that meets or exceeds the recommended system requirements. If you're trying to play on a Mac or Linux, be prepared for potential technical issues and performance changes.
