Defender's Quest - only overlay doesn't work

Previously the comment said Steamworks features didn't work, but trading cards and achievements do work. Only the overlay does not.
Merge pull request #81 from adolson/patch-4

Defender's Quest - only overlay doesn't work
Merge pull request #82 from hypercephalickitten/master

Secrets of Rætikon works.
Cities in Motion 2 and Joe Danger 2 The Movie work.
Cities in Motion now works.
3089 works.