According to the official I'm from Area 51 Steam page , the game has very accessible requirements, making it playable on most modern and even older PCs: Windows Vista / 7 / 8 / 10 Processor: Intel® Core™ i5 or equivalent Memory: 4 GB RAM Graphics: 2 GB DX9 Compliant video card Storage: 1 GB available space DirectX: Version 9.0 How to Download
You can find original ISO files and patches for the 2005 version on the Internet Archive . im-from-area-51-pc-game-free-download-full-version
Community members on Reddit have created restored versions specifically for Windows 10 and 11 compatibility. According to the official I'm from Area 51