Last Minute August Games with Gold: How to Survive

Technically three days and it's full name is How to Survive: Storm Warning Edition

Download How to Survive: Storm Warning Edition from the Xbox site.

Synopsis:

A complete edition including the original crafting survival zombie nightmare plus 6 additional thrilling DLCs. How to Survive now is more fun and tougher than ever. Survive on a zombie infested archipelago, fulfill your basic needs of food, water and shelter while facing natural and unnatural threats. - An eccentric survival guide will teach you to craft dozens of weapons and tools: from fishing rods or bows, to chainsaws or explosives. - 7 islands filled with exuberant flora and fauna.

I may have downloaded it on the 16th but I haven't played it yet as I can't pull myself away from Dying Light. Upcoming September Games with Gold for Xbox One will be The Deer God and Tomb Raider: Definitive Edition.