well depends on how broad a category you put DRM into actually. it's not black and white. Steam is a platform, the ultimate edition requires it so it's not stand alone. To some that's a feature giving you benefits of the platform (achievements, leaderboards etc) to others it's not wanted and a negative to be tied to an account so they call it DRM.
I already own this game on steam from a cheap sale, but I bought this edition hoping it was stand alone, my mistake but that's because I didn't read up on it I just impulse bought it. So I am keeping this unopened for a gift for someone.
This game actually doesn't even need Steam to run -- After you download it (or register the code in the retail version), you can just literally copy and paste the installed folder to another computer. No Steam is ever required.
A lot of Indie games on Steam actually work this way.