Quite a few really good deals here! Some thoughts/recommendations:
13 Sentinels: Aegis Rim. This is a very good price for the game, so much so I'm tempted to buy it again after losing my PS4 copy. I haven't played it on the Switch but I've heard the performance is fine, with a little slowdown during combat sections. The game is 70% visual novel with light adventure game puzzle solving, 30% tactical combat. I loved both parts, and think the story is great overall.
Immortals Fenyx Rising. For the price, the game is absolutely worth it. It's an Ubisoft take on Breath of the Wild, with a Greek Mythology focus for the story. The humor can be a little hit or miss, but I thought the combat was better than Breath of the Wild and I remember enjoying the puzzles and exploration more, on the whole. Breath of the Wild has higher highs than this game, but Immortals was a more consistent enjoyment for me.
Civilization 6. I haven't played the switch port, but the game is overall really good. It's a turn based strategy game where you pick a real life civilization and then develop them over the course of millennia. The late game tends to be a little same-y (if you've made it that far you're likely doing fine in game), and the difficulty settings give the AI more advantages without really making them smarter, but I've put over 100 hours on the game on PC because there's a ton of repairability.
Pheonix Weight Ace Attorney Trilogy and Great Ace Attorney. The pheonix wright games are basically visual novels where you play as an attorney trying to prove his clients' innocence. The original trilogy largely holds up and can still be enjoyed by newcomers, but the Great Ace Attorney has a lot of quality of life improvements that probably make it the easier entry to start with. The Great Ace Attorney is also set 100-200 years before the original trilogy, so you can play either without needing the other.
South Park: The Fractured But Whole and The Stick of Truth. If you like South Park, these games are worth the price. Some people prefer the combat in the first game, but I recall really liking the combat in the second as well. I also think the story did a better job of being it's own thing in the second, whereas in the first game it felt like it was referencing the show too often without being original often enough. Either game is worth picking up though, especially if you like the humor of the show.
Ys VIII. A surprise hit for me after impulse buying years ago. It's an action jrpg where the action is very arcade-y (in a good way). The story starts out about a group of people getting shipwrecked on a deserted island. Part of the fun in the early game was finding the castaways and building up your little base on the island. The story eventually develops into something really ridiculous, but by the time it got there I was along for the ride. Worth a try for jrpg fans.
Persona 4 Golden. Another good jrpg, this one is about a highschooler who has moved to a small town from the big city and tries to settle in. At the same time, murders start happening throughout the town, and the main character and his friend get roped into solving the mystery. The game is LONG, as a warning, but generally managed to keep my attention the whole way through. Personally, while I still enjoyed the game overall, I do have to say that as someone under the LGBTQ umbrella, some parts of the game bother me. One of the first characters you get is constantly homophobic, to the point I constantly hated him (some people theorized he's in the closet, but even if that was the original plan with the character, all we get in game is his constant homophobia). There are two other characters who in theory should be LGBTQ, but the game never commits to their Identities, so they're in their weird space where it's so easy to read them that way, but the actual text of the game would imply it's nothing. Also, romance is a decently big side story to the game, but you can only romance women (which might not be a negative for most, but bothered me). Overall though, I still enjoyed my time with the game and think it's worth playing.
AER: Memories of Old. A game where you fly around and discover secrets of the past. I played this years ago on PC, but remember enjoying it. Not much more to say, other than at the price it's worth a shot if the trailers at all look interesting.
Battlechef Brigade. A fun match up of 2D hack and slash gameplay with match 3 puzzle solving. The art is really cute too. The story is interesting, but I seem to recall it falling a bit flat for me near the end. Still, the price is absolutely worth it.