Sorry, was a pricing error, hope some people managed to get it :-)
Steam key, cheapest this has ever been.
NOTE: When ordering, this says the game is region locked. I have just purchased and it activated fine on my (Australian) Steam account. Didn't need a VPN for activation.
Season pass is on sale at Amazon for $USD 5.10
Just about to put this on OZ B. Great price. I'm finding that region locked games have been activating for me lately. Does it have anything to do with Australia being linked to the U.S steam? And thanks for the heads up on the season pass price on Amazon.