It's my most played Steam game, I've wasted 500 hours of my life on it over the past 3 years. Definitely would recommend it.
I don't normally like survival type games, but this one's different. First of all, it's more realistic. No zombies, no cryptids. It's simply man vs nature. Your plane has crashed on a huge, remote Canadian island that has been abandoned since the 90s, and in the brutal winter - now go survive. You may start off in the mountains and be completely screwed within 5 hours from frostbite and hypothermia, or you'll get lucky and happen across a log cabin with some warm clothes and a fireplace. There are lots of locations, ranging from rural/forest/mountains to semi built up areas, the odd abandoned town, even a tourist lake surrounded by abandoned holiday chalets. I could go on for ages, but in a nutshell - it's one of the most engaging games I've ever played. I only play the Sandbox, and it's single player only. There is a story mode in the works, but it's a bit pants.