I also like to trade several smaller keys for a bigger one of mine...
FYI the DLC at the end of the game titles holds no meaning!

Witcher Thronebreaker
Metro: Exodus Game/DLC
All Leisure Suit Larry Games
A Game of Thrones: The Board Game
Shadow Tactics Blades of The Shogun x 2
Planet Zoo
Blacksad: Under the Skin
The Great Perhaps
Going Under
Max Payne 3 Game/DLC
Ryse: Son of Rome
Sunset Overdrive Game/DLC
This War of Mine Game/DLC
ROGUE HEROES: RUINS OF TASOS
NARUTO TO BORUTO: SHINOBI STRIKER
Eternity The last Unicorn
Gift of Parthax
Namariel Legends: Iron Lord Premium Edition
Dead Synchronicity: Tomorrow Comes Today
Going Under
Monster Den Chronicles
Monster Den Godfall
The Night of the Rabbit
1954 Alcatraz
Sea Legends: Phantasmal Light Collector's Edition
Postal STEAM
Serious Sam: The Random Encounter STEAM
Torchlight 2
Fling To the Finish x 2
Star Wolves 3
Stalingrad x 2
Smile For Me
EL Matador x 2
The next Penelope
Pilot Brothers 2
Rig n Roll x 2
Robins Island Adventure
Learn Japanese To Survive! Kanji Combat
Learn Japanese To Survive! Hiragana Combat
Holy Potatoes! A weapons shop! x 2
Rebel Galaxy Outlaw
Crashlands x 2
Hello Pollution
The Long Dark Game/DLC
Car Mechanic Simulator 2018 Game/DLC
Yono and the Celestial Elephant
AutomaChef
They Bleed Pixels
The World Next Door
Virgo vs the Zodiac
The Next Penelope
Railway Empire
Endless Space 2 Game/DLC
Ring of Pain Game/DLC
Kerbal Space Program Game/DLC
Starbound Game/DLC
Popup Dungeon Game/DLC
Expeditions: Viking Game/DLC
Skullgirls 2nd Encore Game/DLC
Gloria Victis Game/DLC
Wandersong Game/DLC
Supraland Game/DLC
Crying Suns Game/DLC
Wizard of Legend Game/DLC
Amnesia: Rebirth Game/DLC
Amnesia: The Dark Descent Game/DLC
Amnesia: A Machine for Pigs Game/DLC
Vagante Game/DLC
Monaco Game/DLC
Wargroove Game/DLC
WARSAW Game/DLC
Drawful 2 Game/DLC
SUPERHOT Game/DLC
Dear Esther: Landmark Edition Game/DLC
Broken Age Game/DLC
Pikuniku Game/DLC
Lust from Beyond: M Edition Game/DLC
Inmost Game/DLC
Pathway Game/DLC
Rustler Game/DLC
112 Operator Game/DLC
911 Operator Game/DLC
Radio Commander Game/DLC
Kingdom Two Crowns Game/DLC
West of Dead Game/DLC
Tooth and Tail Game/DLC
SYSTEM SHOCK: ENHANCED EDITION Game/DLC
Driftland: The Magic Revival Game/DLC
Toejam & Earl: Back in the Groove Game/DLC
Book of Demons Game/DLC
Fury Unleashed Game/DLC
Going Under Game/DLC
Yoku’s Island Express Game/DLC
Nex Machina Game/DLC
X-Morph: Defense Game/DLC
X-Morph: Defense – European Assault Game/DLC
X-Morph: Defense – Survival Of The Fittest Game/DLC
X-Morph: Defense – Last Bastion Game/DLC
Motorcycle Mechanic Simulator 2021 Game/DLC
Out of Reach: Treasure Royale Game/DLC
DV: Rings of Saturn Game/DLC
Slinger VR Game/DLC
Pixplode Game/DLC
Brothers – A Tale of Two Sons Game/DLC
EarthX Game/DLC
Neverout Game/DLC
Telefrag VR Game/DLC
Pawnbarian Game/DLC
NecroWorm Game/DLC
Hexologic Game/DLC
Post Void Game/DLC
Moon Hunters Game/DLC
The Amazing American Circus Game/DLC
Roarr! Jurassic Edition Game/DLC
Corridor Z Game/DLC
Draw Slasher Game/DLC
Hidden Shapes Old West - Jigsaw Puzzle Game
Shing! Game/DLC
Go Home Dinosaurs Game/DLC
Dagon: by H. P. Lovecraft – The Eldritch Box DLC Game/DLC
Soulblight Game/DLC
Treasure Hunter Simulator Game/DLC
Orbital Racer Game/DLC
Lust for Darkness Game/DLC
Liberated Game/DLC
Wanderlust: Travel Stories Game/DLC
Say No! More Game/DLC
Pathfinder Second Edition Core Rulebook Book
Starfinder Core Rulebook Book
Warhammer Fantasy Roleplay 2nd Edition Core Rulebook Book
Army of Darkness One-Shot Humble Bundle Exclusive Comic
Red Sonja: Petitioning the Queen Humble Bundle Exclusive Comic
Soviet Daughter: A Graphic Revolution Book
The Blight Book
The Incal Book
MAKHNO Book
Judge Death: My Name is Death Book
The Boys Vol. 1 Comic
Automate the Boring Stuff with Python Book
We Are Alright Video
GameMaker Studio 2 Creator 12 Months Software
Intro to Game Development with Unity Software
Complete Unity 3D Developer Software
RPG Maker VX Software
GameGuru Software
Synth Fuel 2 Drones & FX Software
Photo Optimizer Software
Polygon Farm Software
Polygon City Software
Polygon Prototype Software
MusicMaker EDM Software
PDF-Suite Software
Apprentice Study Software
Shanty Fences Software
Dock Accessories Software
Tavern Bar – Chairs & Tables Software
Thatch Hut Software
Yaks Software
Sitting Female Townsfolk Software
Sitting Male Townsfolk Software
Small Viking Huts Software
Fantasy Facade Pack 1 Software