Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - General Questions about Steam- and Retailversion

Steam has DRM protection which means you require steam to play the game.
Good old Game version dont require steam to play the game.
Retail version dont require steam to play the game.

It is recommended that you buy the game from www.GOG.COM to play the DRM free version. I dont like steam. It forces DRM on you even if you don't even need steam to play the game.

I dont think they will release GOG version so you have to play the DRM version on steam.

https://www.kickstarter.com/projects/larianstudios/divinity-original-sin/posts
You get a digital copy of Divinity: Original Sin for Windows PC, Mac or Linux(*) via your preferred digital retailer such as Steam or GOG.com if available. Digital copies come with a digital manual. This low price is only available to those who help fund.