Slime Rancher is an awesome game. It has been out for quite some time for PC, and I think recently for Xbox One, but I only recently got into it.
Basically, you explore a world, breed slimes, feed them to get their plorts, and play the economy to make some cash to expand your ranch.
Check out the video below for a more in-depth look.
Slime Rancher is a really cute game with just enough depth to suck you trying to perfect and grow your ranch. I've put in about 9 hours so far, and I swear most of that passed without me even realizing it. Definitely worth the $20 on Steam.