Key list xd

Age of Wonders: Planetfall
Age of Wonders: Planetfall: Revelations

Battletech
Battletech: Flashpoint
Battletech: Urban Warfare
Battletech: Heavy Metal
Cities: Skylines
Cities: Skylines: After Dark
Cities: Skylines: Snowfall
Cities: Skylines: Natural Disasters
Cities: Skylines: Mass Transit
Cities: Skylines: Green Cities
Cities: Skylines: Parklife
Cities: Skylines: Industries
Cities: Skylines: Campus
Crusader Kings II
Crusader Kings II: Horse Lords
Crusader Kings II: Way of Life
Crusader Kings II: Conclave
Crusader Kings II: The Reaper's Due
Crusader Kings II: Monks and Mystics
Crusader Kings II: Jade Dragon
Crusader Kings II: Holy Fury
Europa Universalis IV
Europa Universalis IV: The Cossacks
Europa Universalis IV: Common Sense
Europa Universalis IV: Mare Nostrum
Europa Universalis IV: Rights of Man
Europa Universalis IV: Mandate of Heaven
Europa Universalis IV: Third Rome
Europa Universalis IV: Cradle of Civilization
Europa Universalis IV: Rule Britannia
Europa Universalis IV: Dharma
Europa Universalis IV: Golden Century
Hearts of Iron IV
Hearts of Iron IV: Together for Victory
Hearts of Iron IV: Death or Dishonor
Hearts of Iron IV: Waking the Tiger
Hearts of Iron IV: Man the Guns
Hearts of Iron IV: Radio pack
Imperator: Rome
Magicka 2

Pillars of Eternity
Pillars of Eternity: The White March Part 1
Pillars of Eternity: The White March Part 2
Stellaris
Stellaris: Leviathans
Stellaris: Utopia
Stellaris: Synthetic Dawn
Stellaris: Apocalypse
Stellaris: Humanoids
Stellaris: Plantoids
Stellaris: Distant Stars
Stellaris: MegaCorp
Stellaris: Galaxy upgrade pack
Stellaris: Lithoids
Stellaris: Federations
Steel Division: Normandy 44
Steel Division: Normandy 44 - Second Wave
Steel Division: Normandy 44 - Back to Hell
Surviving Mars
Surviving Mars: Space Race
Surviving Mars: Green Planet
Tyranny
Tyranny: Tales of the Tier
Tyranny: Bastard’s Wound

The keys are all for Steam.
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