I noticed some games from my Steam library weren't showing up in Playnite.
It bothered me not knowing which games not getting listed in Playnite.
So I exported my Steam database in Playnite en compared it to an export made in Depressurizer (https://github.com/Depressurizer/Depressurizer)
With some spreadsheet wizardry I made this list of games I own in Steam but who are not imported in Playnite.
Maybe you can use it to troubleshoot this issue.
Aborigenus
Absconding Zatwor
Absoloot
Accurate Segmentation
Achaem
Achievement Hunter: Cromulent
Adventures of Heroes
After Hours
AirMech Strike
Alien Run
Android John
Anykey Simulator
Armillo
Ashi: Lake of Light
Athopiu - The Final Rebirth of Hopeless Incarnate
AuroraRL
Autonomous Prototype
Aven Colony Demo
AWAKE - Definitive Edition
Balancelot
Ballistic Attack
Barclay: The Marrowdale Murder
Beast Blaster
Best Time Kill
Between Two Castles - Digital Edition
Bitcoin Miner
BitRay2
Black Lake Prototype
Blood Bond - Into the Shroud
Blood of Old - The Rise To Greatness
Blood of Old (OLD VERSION)
Bloodbath Kavkaz
Bloody Boobs
BoneBone: Rise of the Deathlord
Boon Boon
BRAZEN Prototype
Break Into Zatwor
Breath of Death VII
Brilliant Bob
Business clicker
Case #8
Case #9
Casino Noir
Castle Break
Castle of Venia
Chill Out
Circle pong
Click and Manage Tycoon
Codename Gordon
Cold wires
Company of Heroes
Costume Quest Prototype
Cowboy Rewenge
Crankies Workshop: Bozzbot Assembly
Crap Attack
Crashbots
Crazy Oafish Ultra Blocks: Big Sale
Crazy Pirate
Cryptozookeeper
Crystal City
Cthulhu Saves the World
Cube Master: Light Adventure
Cube Mission
Cubicity: Slide puzzle
Cyber Gun
Cyber OutRun
Cyborg Detonator
Daemon 9
Dangerous Skies 80's edition
Darconika: The Cube of Soul
Dark Project
Dark Snow
DARK SOULS™: Prepare To Die Edition
Dark Zone
Dead Forest
Deadly Sky
Defending Camelot
Dima Rescues Ira
Dispatcher
Dota 2
Dots
Double Cubes
Douche Bag
Dragon's Dungeon: Awakening
Drop
Drop The Bomb
Duality
Dungeons Of Kremlin: Remastered
Dungeons&Vampires
EM: Shader Attack
Envoy
Escape From Tethys
Estranged: Act I
Everpath: A pixel art roguelite
Everything Will Flow ????
EW/WE
Fable Rush
Fairyland: Blackberry Warrior
Fairyland: Manuscript
FastGo Running
Fiends of Imprisonment
Fish for gold
Food From The Sky
Four Kings One War
From The Sky
Frontline Tactics
Fugue in Void
Game of Thrones
Gangsta Sniper
GEARGUNS Tank offensive
Gears 5
Glitch Simulator 2018
Go! Go! Nippon! ~My First Trip to Japan~
Golf Extreme
GooCubelets
GooCubelets 2
GooCubelets: OCD
GooCubelets: The Algoorithm
Good Archer
Goodbye My King
Gravity puzzles
Gravity Wars
Gremlins vs Automatons
Gridberd
Guardians Of The Past
Guess who ?
Gunslugs:Rogue Tactics
Hack n Slash Prototype
Half Past Impossible
Happy Song Prototype
Hard Minus
Hard Room
HardBall
Headache
Heavy Dreams
HellAngel
Hunahpu: Way Of The Warrior
I'm from area 51
Idolzzz
In The Fighting
Incandescent 2
Infernales
Infinite Fall
Insane Road
Invasion
Invention
Inverted
Iron Impact
Itineris
Jagged Alliance 2 - Wildfire
Jorji and Impossible Forest
Jump Like A Pirate
Jump with Friends
Jumping Tank
JUST DASH
Karateka
Khan VS Kahn
Latte Stand Tycoon
Life At Space
Life Beetle
Life source
LO-OP
Loading
Lost Daughter
Lost in Space
Lost In Space 2
Lost In Woods 2
Lovers ' Smiles
LUXOR: 5th Passage
macdows 95
Marble Trap
Martian Law
Midsummer Night
Mini Golf Coop
Mini Knight
Mini Motor Racing X
Minimized
Moss Destruction
MRAK
Mushroom Quest
My Loved Heart
My Super Tower 2
Nanooborg
Nanoswarm
Need For Gowna
Neighbor
NeonCode
NeonGalaxy Wars
Neverliria
Nimble Bunn
Ninja from Hell vs. Reptiloids
Noise
OHOTA KREPKOE
One Drop Bot
One Gun: Cat
One Star
One way to exit
Oppaidius Summer Trouble!
Outliver: Redemption
Overhell
Owl Watch
Pain Train 2
Paint Skills
Pandemic: The Board Game
Party Hard 2
Petrichor
Pew-Pew Rocket
Phantasmata
Physic Monster
Pid
Pineapple Smash Crew
PixBit
Pixel Robot Hunter
Plane War
Pleasure Puzzleortrait
Polaris
Post Master
Postmen Of Horizon
POWERCUT, Inc
Preventive Strike
Princess.Loot.Pixel.Again
Princess.Loot.Pixel.Again x2
Protoshift
Psychedelic platformer
PUTIN 20!8
Puzzler World
Rage Parking Simulator 2016
RAMS
Random Journey
Realm of the Mad God Exalt
Red Gate
Reptilians Must Die!
Republique VR
Retro Space Shooter
RGB RUN
RKN - Roskomnadzor banned the Internet
Robo Encryption
Rocketcers
Running Sausage
Russian Horror Story
Sam & Max 104: Abe Lincoln Must Die!
SharpShooter3D
Shut Up And Dig
Sig.Null
Skywalk
Slash or Die 2
Sleengster
Sleengster 2
Snail Racer Extreme
SnakEscape
Snow Jewels
SNUSE 221
Soldier of Failure: Operation Zombie
Soul of the Devil
Spacecraft
Spakoyno: Back To USSR 2.0
Spiral Knights
Squeezone
Stickman Destruction
Stigmat
Stream Games
Super Cloudbuilt
Swipe Fruit Smash
Symbiotic Overload
TAVERN GUARDIANS: BANQUET
Team Fortress 2
THE ART - Puzzle
The Atomy
The Big Elk
The Binding Of YOU
The Coma - light and darkness battleground
The Crypts of Anak Shaba - VR
The Cube
The Culling: Day 1 Reference
The Extinction
THE GREAT GEOMETRIC MULTIVERSE TOUR
The lost joystick
The Note
The Orb Chambers
The Outpost Nine
The Shadow of Hell
The Tower
The Wall
The White Birch Prototype
They Came From The Moon
Thunder Paw
Tomato Way 2
Torch Cave
Torch Cave 2
Tricky Cat
Under Zero
UNI
Unite Cell
Universe in Fire
Vogue, the Explorer
Voxel Race
Voxel Warfare Online
VR Journey
WAR DRONES
War Selection
Watch This!
Weaverse
When Ski Lifts Go Wrong
Why So Evil
Why So Evil 2: Dystopia
Wizard Slime
Wolf Simulator
Word Killer: Revolution
Zombie Boom
Zzzz-Zzzz-Zzzz
It bothered me not knowing which games not getting listed in Playnite.
So I exported my Steam database in Playnite en compared it to an export made in Depressurizer (https://github.com/Depressurizer/Depressurizer)
With some spreadsheet wizardry I made this list of games I own in Steam but who are not imported in Playnite.
Maybe you can use it to troubleshoot this issue.
Aborigenus
Absconding Zatwor
Absoloot
Accurate Segmentation
Achaem
Achievement Hunter: Cromulent
Adventures of Heroes
After Hours
AirMech Strike
Alien Run
Android John
Anykey Simulator
Armillo
Ashi: Lake of Light
Athopiu - The Final Rebirth of Hopeless Incarnate
AuroraRL
Autonomous Prototype
Aven Colony Demo
AWAKE - Definitive Edition
Balancelot
Ballistic Attack
Barclay: The Marrowdale Murder
Beast Blaster
Best Time Kill
Between Two Castles - Digital Edition
Bitcoin Miner
BitRay2
Black Lake Prototype
Blood Bond - Into the Shroud
Blood of Old - The Rise To Greatness
Blood of Old (OLD VERSION)
Bloodbath Kavkaz
Bloody Boobs
BoneBone: Rise of the Deathlord
Boon Boon
BRAZEN Prototype
Break Into Zatwor
Breath of Death VII
Brilliant Bob
Business clicker
Case #8
Case #9
Casino Noir
Castle Break
Castle of Venia
Chill Out
Circle pong
Click and Manage Tycoon
Codename Gordon
Cold wires
Company of Heroes
Costume Quest Prototype
Cowboy Rewenge
Crankies Workshop: Bozzbot Assembly
Crap Attack
Crashbots
Crazy Oafish Ultra Blocks: Big Sale
Crazy Pirate
Cryptozookeeper
Crystal City
Cthulhu Saves the World
Cube Master: Light Adventure
Cube Mission
Cubicity: Slide puzzle
Cyber Gun
Cyber OutRun
Cyborg Detonator
Daemon 9
Dangerous Skies 80's edition
Darconika: The Cube of Soul
Dark Project
Dark Snow
DARK SOULS™: Prepare To Die Edition
Dark Zone
Dead Forest
Deadly Sky
Defending Camelot
Dima Rescues Ira
Dispatcher
Dota 2
Dots
Double Cubes
Douche Bag
Dragon's Dungeon: Awakening
Drop
Drop The Bomb
Duality
Dungeons Of Kremlin: Remastered
Dungeons&Vampires
EM: Shader Attack
Envoy
Escape From Tethys
Estranged: Act I
Everpath: A pixel art roguelite
Everything Will Flow ????
EW/WE
Fable Rush
Fairyland: Blackberry Warrior
Fairyland: Manuscript
FastGo Running
Fiends of Imprisonment
Fish for gold
Food From The Sky
Four Kings One War
From The Sky
Frontline Tactics
Fugue in Void
Game of Thrones
Gangsta Sniper
GEARGUNS Tank offensive
Gears 5
Glitch Simulator 2018
Go! Go! Nippon! ~My First Trip to Japan~
Golf Extreme
GooCubelets
GooCubelets 2
GooCubelets: OCD
GooCubelets: The Algoorithm
Good Archer
Goodbye My King
Gravity puzzles
Gravity Wars
Gremlins vs Automatons
Gridberd
Guardians Of The Past
Guess who ?
Gunslugs:Rogue Tactics
Hack n Slash Prototype
Half Past Impossible
Happy Song Prototype
Hard Minus
Hard Room
HardBall
Headache
Heavy Dreams
HellAngel
Hunahpu: Way Of The Warrior
I'm from area 51
Idolzzz
In The Fighting
Incandescent 2
Infernales
Infinite Fall
Insane Road
Invasion
Invention
Inverted
Iron Impact
Itineris
Jagged Alliance 2 - Wildfire
Jorji and Impossible Forest
Jump Like A Pirate
Jump with Friends
Jumping Tank
JUST DASH
Karateka
Khan VS Kahn
Latte Stand Tycoon
Life At Space
Life Beetle
Life source
LO-OP
Loading
Lost Daughter
Lost in Space
Lost In Space 2
Lost In Woods 2
Lovers ' Smiles
LUXOR: 5th Passage
macdows 95
Marble Trap
Martian Law
Midsummer Night
Mini Golf Coop
Mini Knight
Mini Motor Racing X
Minimized
Moss Destruction
MRAK
Mushroom Quest
My Loved Heart
My Super Tower 2
Nanooborg
Nanoswarm
Need For Gowna
Neighbor
NeonCode
NeonGalaxy Wars
Neverliria
Nimble Bunn
Ninja from Hell vs. Reptiloids
Noise
OHOTA KREPKOE
One Drop Bot
One Gun: Cat
One Star
One way to exit
Oppaidius Summer Trouble!
Outliver: Redemption
Overhell
Owl Watch
Pain Train 2
Paint Skills
Pandemic: The Board Game
Party Hard 2
Petrichor
Pew-Pew Rocket
Phantasmata
Physic Monster
Pid
Pineapple Smash Crew
PixBit
Pixel Robot Hunter
Plane War
Pleasure Puzzleortrait
Polaris
Post Master
Postmen Of Horizon
POWERCUT, Inc
Preventive Strike
Princess.Loot.Pixel.Again
Princess.Loot.Pixel.Again x2
Protoshift
Psychedelic platformer
PUTIN 20!8
Puzzler World
Rage Parking Simulator 2016
RAMS
Random Journey
Realm of the Mad God Exalt
Red Gate
Reptilians Must Die!
Republique VR
Retro Space Shooter
RGB RUN
RKN - Roskomnadzor banned the Internet
Robo Encryption
Rocketcers
Running Sausage
Russian Horror Story
Sam & Max 104: Abe Lincoln Must Die!
SharpShooter3D
Shut Up And Dig
Sig.Null
Skywalk
Slash or Die 2
Sleengster
Sleengster 2
Snail Racer Extreme
SnakEscape
Snow Jewels
SNUSE 221
Soldier of Failure: Operation Zombie
Soul of the Devil
Spacecraft
Spakoyno: Back To USSR 2.0
Spiral Knights
Squeezone
Stickman Destruction
Stigmat
Stream Games
Super Cloudbuilt
Swipe Fruit Smash
Symbiotic Overload
TAVERN GUARDIANS: BANQUET
Team Fortress 2
THE ART - Puzzle
The Atomy
The Big Elk
The Binding Of YOU
The Coma - light and darkness battleground
The Crypts of Anak Shaba - VR
The Cube
The Culling: Day 1 Reference
The Extinction
THE GREAT GEOMETRIC MULTIVERSE TOUR
The lost joystick
The Note
The Orb Chambers
The Outpost Nine
The Shadow of Hell
The Tower
The Wall
The White Birch Prototype
They Came From The Moon
Thunder Paw
Tomato Way 2
Torch Cave
Torch Cave 2
Tricky Cat
Under Zero
UNI
Unite Cell
Universe in Fire
Vogue, the Explorer
Voxel Race
Voxel Warfare Online
VR Journey
WAR DRONES
War Selection
Watch This!
Weaverse
When Ski Lifts Go Wrong
Why So Evil
Why So Evil 2: Dystopia
Wizard Slime
Wolf Simulator
Word Killer: Revolution
Zombie Boom
Zzzz-Zzzz-Zzzz