Holy shit I have opinions about so many of these games, some really great times ahead of you!

N Sane Trilogy - this has been covered a bunch in Vern's thread, but I LOVE this series! It has a ton of nostalgia for me. The first game is definitely the hardest, while still doable, and all three are very fun.

Life is Strange things - Before the Storm is fantastic! Really beefs up Chloe's character and maintains the emotional resonance without overstaying its welcome. LiS 2 isn't as good as 1 overall, but still enjoyable. The ending of 2 hit harder for me, though. Captain Spirit is fun and improves the main game experience, so definitely play it when recommended in the narrative.

Arkham Series - the combat is so fucking fun. Asylum is much more linear, but worth playing in order to appreciate the mechanics improvements over time (plus some of the boss fights in Asylum are fantastic).

It Takes Two - I'm maybe 2/3 of the way through (playing with Goblin) and LOVE the variety of gameplay and levels. It's wild how many different mechanics they've included, especially since so many are around for such a short time. Story is cute, fun to play with a partner so hopefully Nicole's into it.

LIMBO - definitely a "masterpiece" of game design. I didn't get super into it but can't argue with how well made it is. Pretty short.

Ori - FANTASTIC game! Not too hard outside of the escape sequences if you platform and just so absolutely beautiful. Ori feels wonderful to control.

Portals - I like 1 more than 2 which I think is controversial, but these are some of the best games ever made with fantastic level design and genuine humor. Make you use your noggin.

Psychonauts - I'm assuming this is the second? I enjoyed it, but less than I expected given all the hype. The controls are a bit wonky and having to constantly switch abilities is annoying. Some pretty creative level design and good writing/story.

Stanley Parable - honestly, just download this now and fuck around in it. It's great to pick up and play for 20-30 mins to explore everything it has to offer.

If I were you and getting to play all of these for the first time, I'd run straight for Portal, Ori, and It Takes Two, but damn you really can't go wrong.

Might make one of these too! Would love some recs from all the unplayed games I have and somewhere to track and review.