Free [Demolish & Build 2017 + 3 more] - Blackscreen Simulator & Robot Squad Simulator 2017 added

As per steamgifts rules i can't post the link because it uses steps, but since it's a 20 euro game and looks like a decent game, now apparently this already been given away for a month now, but it's the first time i heard about it, maybe they refilled it.

Now if you google: demolish & build 2017 free steam, the top few hits should point out to where you can find it, the site is "marvelous".
You can also find steam keys for Lost in the Forest, Lost with Dinosaurs and a bunch of Forge of God Dlc's there.

http://store.steampowered.com/app/470740/Demolish__Build_2017/
http://store.steampowered.com/app/405760/Robot_Squad_Simulator_2017/
http://store.steampowered.com/app/741460/Blackscreen_Simulator/

[Update 1: Some clarification]
Pass: You can skip the visit x site and invite your friends steps, watching a video on youtube and likes on facebook.
Maybe: Discord/Twitter.
Must do: Twitch (On top of the page, under your avatar, link your Twitch account!) and the steam stuff (following/joining/add to wishlist).

You don't have to verify the steps, but when you try to grab a key and you missed a step it will completely reload the website (you don't have to redo the steps though), and it's not easy to tell what steps you done or not, so personally i'd recommend it.

[Update 2] Apparently some people are starting to get duplicate keys, so be prepared for that (and nothing i can do about that).
You should also be able to attach the same Twitch account to other steam accounts, so if you got a duplicate or want to gift it to someone else, you could do that, you just need to redo the steam stuff on that steam account.

Free DLC are most likely for the Arcane or Occult Raise games. http://store.steampowered.com/search/?developer=Arcane%20Raise