DRM-free

This isn't Steam redeemable, it activates only on gog.com, so you are out of luck.

Steam is a DRM, so DRM free means no steam. Basically you can download install files from humble site, install it and play it but cannott add it to any of your DRM libraries ;p

I see, thanks for the quick replys guys ^_^

No. DRM Free is when there are no DRM services applied. It is when you own the game you buy rather than placing your game in the hands of a median DRM service. Therefore steam would never = DRM Free.

If you buy it on Steam it will also give you a key in your library for GOG which you can then redeem here to get the DRM-free version in addition to the Steam version:

http://www.gog.com/witcher/backup

If you are not going to play it inmediatly maybe you can wait until the next steam big sale. There coul be even a deal before TWIII is out :)

I might wait and see. Iam planning to play the trilogy, just got the first one recently and going to try it out next week