In taking a quick look at the Game Pass selection, there's some interesting options for shorter games:
- Overcooked 2 is wonderful and simple fun. Also great to play co-op, my girlfriend and I had an absolute blast playing through it.
- Braid is an old Xbox 360 indie game that is a fantastic platforming puzzle game that you should not miss (if you haven't played it already)
- What Remains of Edith Finch is one of the best examples of the "walking simulator" style of game, with an excellent story throughout
- I have not played it yet, but I've heard excellent things about The Messenger, which is a throwback to retro ninja side scrollers like Ninja Gaiden
- Gris is an incredibly unique and artistic platforming game that is a short-but-mesmerizing experience
- Thumper is the most intense rhythm game I've played, and the music is done by Brian from the band Lightning Bolt. Noisy techno metal that is the backdrop of a visually dizzying game that is addictive as hell!
Ooh, Thumper is a lot of fun. I have the PSVR version, and I highly recommend that version if you have PSVR
I've been replaying The Messenger recently, and can confirm it is really great. Tight platforming, lots of comedy, a few unexpected twists, and one of my favorite game soundtracks. Great example of taking NES and SNES staples and running with it to propel the genre further.
Also to add to everyone else's suggestions, I'd like to add these.
Doom 2016
Enter The Gungeon - bullet hell rogue like that I'll never finish. So good I own it on Switch and PC as well. Actually, maybe don't try this one if you haven't yet, you might end up playing it only.
Guacamelee 1 & 2 - more platforming goodness. Has a unique combat system based on Luchador wrestling. Also has lots of humor and heart.
Metro series - Three games total. The games get more open in each sequel, but are all pretty short (8-15 hours each). Post apocalyptic shooters taking place in russia after nuclear fallout, forcing the survivors to live in the Metro tunnels.
Ori 1 & 2. More Metroidvania platforming. These games feature emotional storytelling, gorgeous visuals, satisfying platforing, and great soundtracks.
Yoku's Island Express. Answers that question we've all asked: "what if they made Pinball into a Metroidvania?"
In review, I really like Metroidvania's. I'd normally recommend Hollow Knight above all else, but that first playthrough takes forever (20+ hours for the simplest to obtain ending). Took me 50+ to get the 100% ending