In an official announcement
Here DOS: EE it was said:
From the very first day of production, we designed the Enhanced Edition to be optimized for DirectX 11 graphics. For our Windows players, this means that Divinity: Original Sin Enhanced Edition will require a 64-bit system and a graphics card with DirectX 11 hardware support. However, both editions of the game will remain available to everyone on Steam, so Windows players with 32-bit systems and DirectX 9 will always be able to play Divinity: Original Sin.
Why developers form Larian Studios remove the original game form Steam Store ?
