Another freebie by Indiegala. Not sure about whether this one has been free before or not - kinda lost track a bit. ;-)
In any case, fairly highly rated and trading cards so if you missed here is another chance to grab it.
http://store.steampowered.com/app/326120/
How to get the key:
IG has now got some requirements to be fulfilled before you can get the free key. Those are:
Steam account linked to your Indiegala account
Steam account is a member of the IG Steam group
Steam account must be set to public
The procedure to get the key itself has remained the same:
click on Claim Giveaway button
log in to your IG account
do the captcha
click on the "Claim Free Copy" button
do captcha again (if necessary)
claim your key in your IG account (under IG Giveaways).
redeem key in Steam client
Enjoy!
This one is taking a while. Normally it's instant but it now says it may take up to an hour.