I keep a spreadsheet literally called “games to play”. Ive played about half of these so far, but they all meet your criteria, and all have overall good reviews, here’s a selection from it, including my own notes: (pardon the lack of formatting coming from a spreadsheet)

A Hand With Many Fingers 3 hours Puzzle Difficult (use pen and paper for clues) CIA mystery

A Wolf In Autumn 1 hour Walking Sim Girls nightmare

ADR1FT 6 hours Puzzle Space station catastrophe

Anna - Extended Edition 5 hours Adventure Psych horror in sawmill, inventory based puz

Antichamber 7 hours Puzzle MC-Escher-esque open world physics breaking puzzle solving

Aporia: Beyond The Valley 5 hours Walking Sim Walking Sim+ (puzzles), awaken in ancient temple in jungle

Ballads At Midnight 4 hours Visual Novel Story of a bard and a vampire

Beyond: Two Souls 12 hours Adventure Ellen Page / Willem Dafoe,

Blind Spot 5 hours Puzzle Puzzle mystery story

Brothers - A Tale of Two Sons 3 hours Walking Sim Heart-wrenching story told with no words

Brukel 1 hour Walking Sim 92yr old grandma retells memories of WWII

Close To The Sun 6 hours Walking Sim Looks like Bioshock, great atmo

Cloud Climber 1 hour Walking Sim

Deliver Us The Moon 5 hours Adventure Sci-fi story on moon, some puzzles, some platforming

Dr. Langeskov, The Tiger, and The Terribly Cursed Emerald A Whirlwind Heist 1 hour Walking Sim Very short, hilarious game from maker of The Stanley Principle

Draugen 3 hours Mystery American searching for missing sister in 1920s Norway

Goetia 7 hours Point-And-Click Puzzles / adventure in abandoned house, text heavy

Gorogoa 2 hours Puzzle Hand Illustrated puzzle game

Heavy Rain 10 hours RPG Crime thriller / mystery, multiple outcomes, some QTEs

I Hope She’s OK 1 hour Walking Sim Short mystery at a nordic cabin, told through instagram-like messages

Jessika 3 hours FMV Solve suicide of Jessika

Journey 5 hours Walking Sim Atmospheric exploration

Knee Deep 4 hours Puzzle Mystery in a swampland / theater production

Kona 8 hours Adventure Detective in eerie Canada town

Manifold Garden 6 hours Puzzle M.C. escher landscape build gravity bend puzzles

Murdered: Sould Suspect 10 hours RPG Solve your own murder

Scanner Sombre 3 hours Walking Sim Trippy cave-explore game

SOMA 10 hours RPG Horror adventure

Tacoma 4 hours Walking Sim Sci-fi space station adventure

The Forgotten City 10 hours RPG Time loop in ancient Rome

The House of Da Vinci 7 hours Puzzle Similar to “The Room” series

The Painscreek Killings 10 hours Walking Sim + Murder mystery, find clues and keys

The Secrets of Darkwood 5 hours Txt RPG Descendant of Might and Magic series

The Signifier 9 hours Adventure Dark, tech-noir

The Silent Age 4 hours Point-and-click Short, fairly easy puzzles, time travel post-apocalypse

The Turing Test 6 hours Puzzle Portal/Talos wannabe

The Unfinished Swan 4 hours Puzzle Paint / blob game

To The Moon 4 hours Walking Sim Doctors help dying patients relive life

Untitled Goose Game 6 hours TP-RPG You are a horrible goose

Valley 8 hours Walking Sim Actually running/jumping sim

Of these, the standouts that I’ve played so far are “Scanner Sombre” and “Unfinished Swan” for truly unique gameplay. “SOMA” and “Heavy Rain” for best storytelling. “Painscreek Killings” for best mystery (minus one very out of place sequence). “Forgotten City” for the best standalone Skyrim mod turned into a self contained adventure.