In this entire, pointless debate, I have yet to see a single person come forward with hard documentation from the Kickstarter campaign that explicitly stated that if you pledged enough money to receive a copy of the game, you would receive a Steam key or disc for the game. I cannot find a single thing that promises this at the point the pledges were being taken--the contract between you the investor and Yu's dev team / Deep Silver, that Steam copies were a guaranteed part of the deal to those that wanted it. The only thing the campaign ever promised was to deliver the game on PC.
Tell you what, I've got a real bargain for you. I'm going to give you three quality, delicious juicy burgers for only $1. One single buck.
Oh, it's not were you were expecting? You thought I was going to cook them for you, put them on buns with lettuce, tomato, onions, and pickles? Some condiments on the side?
When did I ever promise that to you? I promised to give you three thick, quality, delicious juicy burgers. Here they are. It's not my fault you made assumptions. No, I'm not giving you your money back. I delivered exactly what I promised when I took your dollar.
Oh, you want to sue me for not offering you a refund? You say I violated your rights as a consumer? I fail to see how any court is going to find in your favor. I delivered exactly what I promised to deliver for the price I agreed to deliver it. Your dissatisfaction entitles you to nothing.