Moon Raider is a nice, challenging pixel art action-platformer. Gameplay is solid; though it does have a few awkward quirks, but it's really fun and it looks great.
https://www.nintendo.com/store/products/moon-raider-switch/
https://store.playstation.com/en-us/product/UP4724-CUSA27346_00-3813071056330523
Moon Raider for Nintendo Switch - Nintendo Official Site

Ava is the young daughter of the brilliant-but-aging scientist Dr. Cavor and Selene, the former queen of the moon. Selene is a selenite whose life depends on special energy only moon gems can provide. With none left and time running out, Dr. Cavor enlist…

Steamroll is a creative, mini-golf-inspired puzzle adventure. Exploration, danger, and different tools add interesting depth to a classic game genre. And the steampunk aesthetic and humor are nice touches.
https://www.nintendo.com/store/products/steamroll-rustless-edition-switch/
Steamroll: Rustless Edition for Nintendo Switch - Nintendo Official Site

In this steampunk setting, you will play as a young engineer on his first day of work. A young man finding a job? As you can see, everything is possible in video games! The problem is that the mine you work on is about to collapse. Luckily, this budding …

Deleveled is a minimalist puzzle-platformer with no jump button. Instead you control two squares that bounce off each other. Tons of creative and challenging levels built around momentum and synchronization.
https://www.nintendo.com/store/products/deleveled-switch/
Deleveled for Nintendo Switch - Nintendo Official Site

What goes up must come down… and what comes down must be bounced! Send momentum from one block to another to shoot them around the map. Cleverly conserve momentum to navigate around the map and flick all the switches but be careful; once you’re down ther…

PHOGS! is incredibly bizarre and utterly delightful. Puzzles aren't that hard, but they are fun and interesting. Co-op must be crazy but I haven't been able to try it myself.
https://store.playstation.com/en-us/product/UP2680-CUSA20207_00-PHOGS000000000US/
PHOGS!

In PHOGS you play as a duo of dogs on a captivating, puzzle-filled adventure. Linked by a stretchy belly, you’ll need to bark, bite and bounce your way through obstacles set across the themed worlds of Food, Sleep and Play, in co-op or single-player. Forage through Food World, teeming with tasty treats. From hot buttered toast to chopped celery... even a river of chocolate Stroll through Sleep World, complete with teddy bears, cushions and quilts, all nestled in the glow of the soothing night-light. Pounce through the crazy toybox of Play World, exploring a beach amusement park, a retro arcade, and everything in between. Woof Supporting single-player and shared-controller gameplay, plus local and online co-op, Red and Blue are always ready to play

Catie in MeowmeowLand is a short, charming, wordless point-and-click. It's basically Alice in Wonderland, but with lots of cats. Surreal, silly, and short. A delight.
https://www.gog.com/game/catie_in_meowmeowland
Catie in MeowmeowLand

Catie in MeowmeowLand Demo is available here Catie in MeowmeowLand is a beautifu

GOG.com
RESTLESS SOUL is a quirky, silly game. It's a twin-stick shooter pretending to be an RPG. Go on a quest to return to Life and fight a supervillain that exists in the afterlife for some reason? Don't expect things to makes sense. Fun and funny.
https://www.nintendo.com/store/products/restless-soul-switch/
https://www.gog.com/en/game/restless_soul
https://www.humblebundle.com/store/restless-soul
Restless Soul for Nintendo Switch - Nintendo Official Site

The adventure of a lifeti—er, afterlifetime—awaits! Help a wayward soul return to the land of the living in this hauntingly humorous comedy adventure that pokes fun at life, death, video games, pop culture, and everything in between. Prevail in bullet-he…

Minute of Islands is a slow, strange, somber adventure. Incredible, unsettling, and yet strangely beautiful visuals accompany the amazing, thoughtful story. Breathtaking (and for Mo that's almost literal!).
https://www.nintendo.com/store/products/minute-of-islands-switch/
https://www.gog.com/game/minute_of_islands
https://www.humblebundle.com/store/minute-of-islands
Minute of Islands for Nintendo Switch - Nintendo Official Site

Explore strange and wonderful islands and dark labyrinths below in this narrative puzzle platformer. Guide young mechanic Mo on her quest to repair a world on the brink of collapse. The powerful Omni Switch at your disposal may not be enough to fix the d…

Speed Brawl is a racing 2D-action combat game. Polished, straightforward combat with an emphasis on speed and combos. Several different characters and tag-teaming spices things a bit. Very solid action game.
https://www.gog.com/game/speed_brawl
Speed Brawl

Speed Brawl ist ein schnelles 2D-Spiel, das harte Kämpfe mit Jump‘n‘Run-Elementen v

GOG.com
Batbarian is a fun, goofy, but still challenging action-adventure with a lot of cool ideas and mechanics. The writing is funny, the combat is great, and the puzzles are interesting.
https://store.steampowered.com/app/837460/Batbarian_Testament_of_the_Primordials/
https://www.gog.com/game/batbarian_testament_of_the_primordials
Save 20% on Batbarian: Testament of the Primordials on Steam

Batbarian: Testament of the Primordials is a snarky action-adventure puzzle game with a good dose of humor. Explore hundreds of secret-filled rooms, fight big bosses, gather companions for your party and use the powers of Pip—your bat buddy—to solve puzzles and escape the eldritch abyss!

Islets is a charming, quirky metroidvania with wonderful visuals, solid combat, challenging platforming, and some neat mechanics. Bring the fragmented sky islands back together, and help out wherever you can. Fantastic game.
https://www.gog.com/game/islets/
Islets

Iko is an aspiring yet hopeful warrior exploring the land and sky to reunite a

GOG.com
Tinykin is a delightful Pikmin-inspired 3D platformer where you're shrunk and must explore a house with the help of littler creatures. Actually plays more like Mario, so even if you don't like Pikmin you should still give this a chance.
https://www.gog.com/en/game/tinykin
https://www.nintendo.com/store/products/tinykin-switch/
Tinykin

Milo arrives on Earth to find that he's way too small, everybody's gone and a day hasn'

GOG.com
Escape Goat is an old favorite of mine. There's a kind of playful ordered chaos to many levels. Others require careful thought, and some demand precise movement. Unique, creative mechanics; really fun.
https://www.gog.com/game/escape_goat
https://www.humblebundle.com/store/escape-goat
Escape Goat

Escape Goat is a puzzle platforming game where you take on the role of a goat who was i

GOG.com
Escape Goat 2 is even better! More levels, shiny graphics, new mechanics, and a level editor and sharing support!
https://www.gog.com/game/escape_goat_2
https://www.humblebundle.com/store/escape-goat-2
Escape Goat 2

None have overcome the Stronghold of Toragos... will you be the first goat to do so? Es

GOG.com
Olija is an amazing and epic pixel-art action-adventure. Gameplay is fantastic and distinctive, and the visuals are great. The horror-tinged story is really engaging. Just all around incredible.
https://www.gog.com/game/olija_game
https://www.humblebundle.com/store/olija
Olija

Olija is a game about Faraday's quest, a man shipwrecked then trapped in the mysterious

GOG.com
NyxQuest is nifty and challenging platformer. As you progress you gain powers from the gods that you use with your mouse at the same time as you do platforming with your keyboard. Unique and fun.
https://www.gog.com/game/nyxquest_kindred_spirits/
NyxQuest: Kindred Spirits

Fly with Nyx across the ruins of the ancient Greece in her dangerous search for her deare

GOG.com
The Adventure Pals is an exciting, cartoony action/adventure platformer clearly influenced by Banjo-Kazooie. It's bursting with energy and enthusiasm. Very fun.
https://www.gog.com/game/adventure_pals
https://www.humblebundle.com/store/the-adventure-pals
The Adventure Pals

The Adventure Pals is an action-packed platformer about friendship, exploration, and ri

GOG.com
Out of Line is a strangely beautiful puzzle platformer. Use a magic spear in lots of interesting puzzles. Visuals are great, and it tells an engaging, cryptic, wordless story.
https://www.gog.com/game/out_of_line
Out of Line

The demo version of Out of Line is available here. Collect great memories with this

GOG.com
Save 81% on SteamWorld Complete Bundle on Steam

And be sure to check out SteamWorld Dig, the upcoming game. There's a demo.
https://store.steampowered.com/app/2134770/SteamWorld_Build/
Steamで80% OFF:SteamWorld Build

死にゆく星という運命に抗い、可能性しかない未開拓地を開発するんだ!深くフカク掘るべし、街を拡大すべし、失われた宇宙レベルの古代技術を見つけ出せ。生命維持に必要な水や燃料を確保せよ、快適な生活こそ生命線だ!キミは最後のフロンティアにたどり着けるか?

GRIME is awesome. A very atmospheric soulslike with a unique look and feel. Gameplay is great, balanced and challenging, countering is essential. Devour your enemies with your black hole head.
https://store.steampowered.com/app/1123050/GRIME/
https://www.gog.com/game/grime
https://www.humblebundle.com/store/grime
Steam で 40% オフ:GRIME

破壊...吸収...成長...『GRIME』は、形状と機能が変異する生物兵器で敵を粉砕し、ブラックホールで敵の残骸を飲み込んで器を強化しながら、アナトミカルな恐怖と陰謀に満ちた世界を解体していく、スピーディで容赦ないアクション・アドベンチャーRPG。

Driftmoon is a nice, fun, traditional CRPG. Gameplay is solid with no surprises. The story is conventional but still well-written, and the humor is cheeky and fun. All around good experience.
https://www.gog.com/game/driftmoon
https://www.humblebundle.com/store/driftmoon
Driftmoon Enchanted Edition

The peace of your enchanted world, Driftmoon, is at an end. An ancient evil is awakenin

GOG.com
Genesis Noir is strange, surreal and beautiful. A cosmic point & click adventure of love and music. Surprising, creative, unique. Oozing with style. Amazing.
https://www.gog.com/game/genesis_noir
https://www.humblebundle.com/store/genesis-noir
Genesis Noir

You play as No Man, a watch peddler caught in a love triangle with other cosmic

GOG.com
Tandem: A Tale of Shadows is a unique and engaging puzzle game with switching from overhead to platforming, and light and shadow mechanics. A bit finicky and obtuse, but still good.
https://www.gog.com/game/tandem_a_tale_of_shadows/
Tandem: A Tale of Shadows

Tandem: A Tale of Shadows definiert das Genre des Puzzle-Platformers mit Top-down- un

GOG.com
Tetrobot and Co. is a fun, unique, challenging puzzle game. Your little robot has to maneuver around, picking up and depositing blocks to explore further. It's really charming. An old favorite of mine.
https://www.gog.com/game/tetrobot_and_co
Tetrobot and Co.

Tetrobot is the world's most popular and reliable robot, but he's not perfect. That's w

GOG.com
Oniken: Unstoppable Edition, from JoyMasher, is a challenging retro action-platformer. An incredibly authentic experience that will take you back to the NES days and Shinobi.
https://www.nintendo.com/store/products/oniken-unstoppable-edition-switch/
https://www.gog.com/game/oniken
Oniken: Unstoppable Edition for Nintendo Switch - Nintendo Official Site

In a post-apocalyptic future controlled by a sinister corporation, ninja mercenary Zaku is the last hope for humanity. Inspired by the demanding gameplay of 8-bit action/platformers, Oniken pits your agility and swordplay against a gauntlet of enemies, t…

Odallus: The Dark Call is another retro game from JoyMasher, but this one is a medieval action/adventure game like Castlevania with branching paths, exploration and upgrades. Also challenging and authentic.
https://www.nintendo.com/store/products/odallus-the-dark-call-switch/
https://www.gog.com/game/odallus_the_dark_call
Odallus: The Dark Call for Nintendo Switch - Nintendo Official Site

The old gods have forgotten this land… Odallus is an exploration/action game and loving homage to the 8-bit genre classics. You play as Haggis – a battle-weary warrior who must wield his sword once more to rescue his son from Darkness. Key Features Eight…

Röki, by Polygon Treehouse, is a wonderful adventure game inspired by Scandinavian folklore. Kinda spooky, especially at the beginning, but more than that it's thoughtful and emotional.
https://www.gog.com/game/roki
https://www.humblebundle.com/store/roki
Röki

Röki ist ein von skandinavischer Folklore beeinflusstes Abenteuerspiel. Ein zeitgenössi

GOG.com
By the way, Polygon Treehouse is working on a new game, Mythwrecked. Shipwrecked on a magical island, Alex must befriend the Greek Gods, help them find their treasures, their memories, and ultimately their identity. Looks interesting.
https://store.steampowered.com/app/2000210/Mythwrecked_Ambrosia_Island/
Steamで40% OFF:Mythwrecked: Ambrosia Island

あなたが流れ着いた場所、それは失われた神話の島。あなたはバックパッカーのアレックスとして、忘れられたギリシャ神話の神々と友だちになり、彼らの記憶を取り戻してあげよう。新たな友情を築き、秘められた謎を解き明かし、そして神々を救うため、力の溢れるこの島を冒険し、そこで紡がれる物語の箱庭を体験しよう。

Yaga is an incredible action RPG based on Slavic folklore. Gameplay is intricate, with lots of interesting systems and choices. The story is engaging and the presentation is fantastic.
https://www.gog.com/game/yaga
Yaga

Verprügle und schlage mörderische Legenden der slawischen Mythologie in diesem düsteren

GOG.com
Apsulov: End of Gods is an incredible and terrifying adventure horror game based in Norse Mythology, but set in the near future. The sci-fi/fantasy story is gripping, and the atmosphere is almost perfect. Amazing, unique game.
https://www.gog.com/game/apsulov_end_of_gods
https://www.nintendo.com/store/products/apsulov-end-of-gods-switch/
Apsulov: End of Gods

Auf der Suche nach der Gnade der Götter grub sich die Menschheit tief in die Erde. Was

GOG.com
The Dream Machine is incredible point & click adventure with visuals made by hand with cardboard and clay (and other stuff). The graphics are really great and unique, but the story is also very engaging. Fantastic.
https://www.gog.com/game/the_dream_machine
https://www.humblebundle.com/store/the-dream-machine
The Dream Machine

The GOG version of The Dream Machine includes all 6 chapters in one package The Dream

GOG.com
Dropsy is a point & click adventure that draws from the classics but also innovates in telling the story of a dim but friendly clown who doesn't know how scary he looks. By turns strange, silly, sweet, tragic, touching, and creepy. A unique, special game.
https://www.gog.com/game/dropsy
https://www.humblebundle.com/store/dropsy
Dropsy

Nachdem ein tödliches Feuer im Zirkus seine Welt in Schutt und Asche gelegt und seinen

GOG.com
TOEM is an charming, chill, enchanting photography adventure. Delightful, creative, fun, friendly.
https://www.gog.com/en/game/toem
https://www.humblebundle.com/store/toem
TOEM

Set off on a delightful expedition and use your photographic eye to uncover the mysteri

GOG.com
Nightmare of Decay is retro survival horror FPS. Resources are scarce in the monster-infested mansion of literal nightmares. Tense and challenging.
https://store.steampowered.com/app/1848450/Nightmare_of_Decay/
Steam で 60% オフ:Nightmare of Decay

A first-person action horror game set in a nightmarish manor infested with zombies, psychotic cultists, and a horde of other horrors. Utilize an assortment of different weapons in a brutal fight for survival as you try to escape from the Nightmare of Decay.

UnMetal is a hilarious and fun Metal Gear parody. Polished gameplay that emulates the classics but is as solid as anything you can play today, and wonderfully funny writing. Fantastic, creative game.
https://store.steampowered.com/app/1203710/UnMetal/
Steamで80% OFF:UnMetal

UnMetalは名作へのオマージュ、ユーモアと皮肉を沢山詰め込んだ2Dステルスアクションアドベンチャーだ。 主人公は全くもってエリートコマンドーではないジェシー・フォックス、無実の罪で投獄されたので知恵と拳を活用して極秘軍事基地からの脱出を図る。

Raji: An Ancient Epic is absolutely amazing. Gorgeous visuals, solid gameplay, engaging story. An exciting action game set in ancient India.
https://store.steampowered.com/app/730390/Raji_An_Ancient_Epic/
Steamで75% OFF:Raji: An Ancient Epic

Raji: An Ancient Epic is an action-adventure game set in ancient India. A young girl named Raji has been chosen by the gods to stand against the demonic invasion of the human realm. Her destiny? To rescue her younger brother and face the demon lord Mahabalasura.

Turbo Overkill is a fast, intense, ultra-violent cyberpunk FPS. Carve up robots, mutants, and cyborgs with your chainsaw leg when you're not blasting them with your powerful arsenal. Crazy fun. Early Access.
https://store.steampowered.com/app/1328350/Turbo_Overkill/
Steamで50% OFF:Turbo Overkill

Enter Paradise as Johnny Turbo—half-metal, half-human, all-murder machine. Clean up the streets with a chainsaw leg, 15+ weapons and your hovercar as you battle the rogue AI Syn, rival bounty hunters and cyberpunks aplenty. Apogee’s most outrageous FPS since Duke Nukem 3D. Good hunting, Sir!

Roundguard is a unique action-RPG roguelike where all the action takes place on pachinko board. Bounce around, hit monsters, use special skills, but be careful, danger is everywhere. Lots of fun.
https://store.steampowered.com/app/848030/Roundguard/
https://www.nintendo.com/store/products/roundguard-switch/
Steamで75% OFF:Roundguard

ラウンドガードは、ピンボール要素とたくさんの戦利品、そして不思議なボールが詰まったランダムな城で構成されるバウンシーダンジョンクローラーです。危険なほどかわいいもモンスターの大群と戦い、すべてが丸いバウンシーアドベンチャーでミステリーダンジョン要素に挑みましょう!

Summer Catchers is an enchanting auto-runner with an engaging story of a girl who wants to experience summer. Interesting gameplay system with item management, limited tools, and missions. Engaging and fun.
https://www.nintendo.com/store/products/summer-catchers-switch/
Summer Catchers for Nintendo Switch - Nintendo Official Site

Embark on an epic road trip adventure of a lifetime in Summer Catchers. With your trusty wooden car you must travel to distant lands full of mystery, strange creatures and exciting races in your quest to finally experience summer. However the journey won…

Archaica: The Path of Light is basically a whole game of those mirror and light puzzles you find in games like Zelda. Good puzzles, very atmospheric.
https://www.nintendo.com/store/products/archaica-the-path-of-light-switch/
https://store.playstation.com/en-us/product/UP4724-CUSA19183_00-ARCHAICAPS400002/
Archaica: The Path Of Light for Nintendo Switch - Nintendo Official Site

As the Light Bearer, your quest is to walk the legendary Path of Light and explore an ancient and beautiful world. The light is the key to open the secrets of this mysterious civilization. You have to understand how various devices work to manipulate th…

If NUTS was just about observing ordinary squirrels in an ordinary forest, it'd already be worth checking out. Interesting gameplay loop, neat visual style, the puzzle-like process. But there's more going on than at first it seems. Investigation time!
https://www.nintendo.com/store/products/nuts-switch/
NUTS for Nintendo Switch - Nintendo Official Site

A single-player surveillance mystery set in a remote forest - record the squirrels, report your findings… and uncover the secret that the curious creatures are hiding. Gear up your caravan, boot up your GPS, spread out your map and head for the depths of…

Time Master is a time-manipulation isometric puzzle-platformer with story. Very well-made, if not very original. Challenging puzzles and neat visuals.
https://store.steampowered.com/app/1486080/Time_Master/
Steam:Time Master

Zeno has accidentally banished his sister, so what now? Create paradoxes to help him complete trials and bring her back, obviously. Take on a wide variety of puzzles while collaborating with your past self and experiencing a fully-voiced cinematic story as you help Zeno bring her back.

FutureGrind is a wild, challenging, and completely unique sports game. Wonderful style, quick to learn, hard to master, and really fun. Also features an interesting sci-fi story.
https://store.steampowered.com/app/355820/FutureGrind/
Save 50% on FutureGrind on Steam

Nail the perfect line in the future's most challenging stunt sport! Grab your bike and hit the rails in this stylish stunt-racer all about tricks, skill, and speed. Chain together huge combos on tracks made of floating rails, but watch out: touch the rail of the wrong color and you'll explode!

Room to Grow is a charming and challenging puzzle game about a cactus pushing plants around. The mechanics are very unique and the puzzles are interesting, and the visuals are nice and complement the gameplay well.
https://store.steampowered.com/app/1471960/Room_to_Grow/
Steamで75% OFF:Room to Grow

サボテンが主役の新感覚パズルゲーム。他の植物を咲かせながら、ぐんぐん成長して砂漠を目指そう!

Helheim Hassle is a goofy puzzle-platformer with unique body part splitting and combining and switching mechanics. It's really creative, looks great, and the writing is really funny. Delightful.
https://store.steampowered.com/app/1095120/Helheim_Hassle/
https://www.humblebundle.com/store/helheim-hassle
Steamで95% OFF:Helheim Hassle

Helheim Hassleはジャンピングパズルゲームの要素を備えたナラティブアドベンチャーゲーム。手足を自由自在に切り離したりくっつけたりできる平和主義者のヴァイキング、ビョルンとなって困難なパズルを解き、向こう見ずな北欧の神々やゴブリン、ドラゴン、怒ったガイコツがはびこる不快な状況から抜け出そう。

Well, I wish I could keep going (there are a lot more games on sale), but I have to stop. And I did cover all the best/most recent stuff. Besides, I don't want to overwhelm you.