I got this from the IOI giveaway from hours ago. I thought it would add some content to my current hitman edition, but when I tried to redeem it, steam tells me I already own the title, so I am sure someone else will benefit from it.
It is a fantastic game.
Once you redeem this, you can install the free version of Hitman 2 and get this levels for free too, so you can play Season 1 with the new engine from Hitman 2.
Have fun