Official specs from Steam

Beyond Good & Evil system requirements

Minimum and recommended PC specs as listed by the developer on Steam.

Minimum

OS *Windows® 2000/XP (only)
Processor700 MHz Pentium® III, Celeron®, or AMD Athlon™ (1 GHz recommended)
Memory64 MB minimum, 128 MB recommended (256 MB recommended for XP)
GraphicsDirectX® 9-compatible 32 MB video card (specific cards supported: ATI® Radeon™ 9700 and Pro, ATI Radeon 9000 and Pro, GeForce™ 4 Ti 4600/Ti 4400/MX 460/MX 440, GeForce3 and Ti500, GeForce2 GTS/MX400/MX)
DirectX VersionDirectX 9.0
SoundDirectX 9-compatible sound card
Hard Drive2.2 GB

FAQ

What graphics card do I need for Beyond Good & Evil?

Minimum: DirectX® 9-compatible 32 MB video card (specific cards supported: ATI® Radeon™ 9700 and Pro, ATI Radeon 9000 and Pro, GeForce™ 4 Ti 4600/Ti 4400/MX 460/MX 440, GeForce3 and Ti500, GeForce2 GTS/MX400/MX).

How much RAM does Beyond Good & Evil need?

Beyond Good & Evil needs 64 MB minimum, 128 MB recommended (256 MB recommended for XP) at minimum.

How big is Beyond Good & Evil?

Beyond Good & Evil requires 2.2 GB.

Does Beyond Good & Evil run on Mac or Steam Deck/Linux?

There is no native macOS version. There is no native Linux build (Proton compatibility may vary).