darthspudius: Why are we talking about this file like it is a disease? If it doesn't do anything why care?
Actually it does - several games with supposedly "inert" steam_api.dll files search for steam, and if they find it, they wont run without it (xenonauts being one). Had this issue with a few games. Brought it up a few times.
Had this issue with the drm free edition of Tower of Guns from humble - it was logging hours played on steam as "Unreal Developers Kit" (as did some others). Contacted Joe Mirabello - he sorted it out. Other devs gave more of a "Meh!" response.
Really, if the game is meant to DRM free, but will search for steam and wont work without it if found... its not drm free.
If I buy a game on steam like that... fine. I bought it on steam.
I wouldnt expect a load of "Daddies Brown Sauce" in my bottle of HP now, would I?!