Bear in mind not all Steam games come with DRM. It is required for things like the Steam marketplace though, which can often add a lot to the game. Kerbal Spac

Bear in mind not all Steam games come with DRM. It is required for things like the Steam marketplace though, which can often add a lot to the game. Kerbal Space Program was quite reluctant to launch on Steam as they didn't want to add the DRM, once they found it wasn't required (or Steam relaxed the rules) they did so and now sell it there and on their own store.