Survival-action game The Flame in the Flood is currently been given away for free on the Humble Store. It can be redeemed on Steam to download for both Windows and OSX.
The Flame and the Flood, it's a cartoon-like survival/action game where you travel by foot and by raft down a procedurally-generated river as you scrounge for resources, craft tools, remedy afflictions, evade the vicious wildlife, and most importantly stay ahead of the coming rains.
The Flame in the Flood has mostly positive reviews on Steam and can be claimed on the Humble Store for the next two days, at no cost.
