Despite years in Early Access, The Forest still stands out amidst the once mighty crop of Survival sandbox games, it tasks you with searching for a missing child after a plane-crash and surviving against clans of cannibalistic mutants, all while trying not to starve or succumb to the elements.
It puts a solid dash of Survival Horror into the Survival subgenre, and it's well worth a look. Especially today, as a major new polishing-and-refinement update has landed for the game, bringing it up to version 0.70.
Picking the survival game that's right for you is tricky. While I'd recommend The Forest wholeheartedly if you don't mind a little horror in your life, you're spoilt for choice otherwise.
You can see the extensive full patch-notes for the new update here, but there aren't too many dramatic additions. The game as it stands currently is largely content-complete, with a distinct beginning, middle and an end which really should not be spoiled. The final act is a hard curveball that not many players are prepared for when it happens.