I've been playing this game in the margins as well as Rush: A Disney/Pixar Adventure, also from Game Pass. I found it really interesting. I like playing these "walking simulators" in between big games. 

What Remains. . . is a little more than a "walking simulator," though. You explore an old house on the shore. The graphics and level of detail are impressive. It's a joy to look at everything even if only a few things are interactive. The story is delivered as you explore and in interactive segments which you activate in various rooms of the house. The interactive segments are all different and, while not being super complicated, are nevertheless very creative and deliver more of the story very effectively. In them you might fly, climb, slither, shoot or other simple activities in the environment outside the house.

I finished the game a few weeks ago but returned last week to get some more achievements. These have you do certain things within the interactive segments or even in the exploration parts. I got some and then earlier this week I got all but one of them. The last one requires that you look in every peep hole and telescope and listen to the voice work before leaving. I felt like I had done this on my first playthrough, but either I missed one or didn't fully listen to the voice work in one of them. So, I'm replaying the whole game. It's not very long, just a few hours or so. 

The story is about a very eceentric family. You are the last member of it (or just about). You revisit every family member's bizarre, macabre end. I'll not spoil it, but there's a reason you are doing this which you don't find out about until the very end. It's a good story. It has elements of a Wes Anderson movie (the eccentric family) and an Edwin Gorey cartoon (the macabre deaths).  

So jump in and play it. The achievements are good at 100 each. Tasty.