Embracer, actually, and while I do suspect that the blame for a lot of these problems lies with them (especially the lack of servers, which was almost certainly down to Embracer cheaping out), it's hard to blame this particular failure on anyone but Aspyr. While Embracer almost certainly created the conditions by not giving them enough time and resources to deliver good work, it's still on Aspyr that they used someone's work without permission. There's no real justification for that, even if you're in a bind.