Lots of decent games (from humble bundles)
Agatha Christie - The ABC Murders
Devil Daggers
Duelyst - 20 Spirit Orbs
Duelyst - Cosmetics Bundle
Elegy for a Dead World
Prison Architect
Punch Club
Road to Ballhalla
RollerCoaster Tycoon 2: Triple Thrill Pack
Runestone Keeper
Stronghold Crusader 2
Battleborn Starter Skin Pack
The Bureau: XCOM Declassified
The Darkness II
Duke Nukem Forever
Freedom Force
Freedom Force vs. The Third Reich
Mafia II Director's Cut
Railroad Tycoon 3
Company of Heroes
Company of Heroes: Opposing Fronts
Company of Heroes: Tales of Valor
Company of Heroes 2 - The Western Front Armies: Oberkommando West
Spec Ops: The Line
LIMBO
Chaos on Deponia
Deponia
Gone Home With Soundtrack
Goodbye Deponia
Q.U.B.E.: Director's Cut
Skullgirls
Beware Planet Earth!
DeadCore
Platformines
Star Trek
Coin Crypt
Endless Space Emperor Edition
Fallen Enchantress: Legendary Heroes
Freedom Planet
The Incredible Adventures of Van Helsing II
Mercenary Kings
Outland - Special Edition
Sid Meier's Civilization V
Braid
Dustforce DX
Super Meat Boy
World of Goo
Crusader Kings II
Crusader Kings II - Sons of Abraham (DLC)
Hearts of Iron III
"Helping Heart" Paradox Forum Icon
Impire
Knights of Pen & Paper +1 Edition
Magicka
Magicka Wizard Wars Paradox Playtpus Robe
Sengoku
Ship Simulator Extremes
Teleglitch: Die More Edition
Victoria II
War of the Roses: Kingmaker
Bejeweled 3
Dead Space 2
Screencheat
Mass Effect 2
Deus Ex: Human Revolution - Director's Cut
Hitman: Absolution
Kane & Lynch Collection
Lara Croft and the Guardian of Light
Murdered: Soul Suspect
Startopia
Supreme Commander 2
Star Wars: Dark Forces
Star Wars Jedi Knight Dark Forces II
Star Wars Jedi Knight II: Jedi Outcast
Star Wars Jedi Knight: Jedi Academy
Star Wars Knights of the Old Republic II: The Sith Lords
Lots of decent games (from humble bundles)
Agatha Christie - The ABC Murders
Devil Daggers
Duelyst - 20 Spirit Orbs
Duelyst - Cosmetics Bundle
Elegy for a Dead World
Prison Architect
Punch Club
Road to Ballhalla
RollerCoaster Tycoon 2: Triple Thrill Pack
Runestone Keeper
Stronghold Crusader 2
Battleborn Starter Skin Pack
The Bureau: XCOM Declassified
The Darkness II
Duke Nukem Forever
Freedom Force
Freedom Force vs. The Third Reich
Mafia II Director's Cut
Railroad Tycoon 3
Company of Heroes
Company of Heroes: Opposing Fronts
Company of Heroes: Tales of Valor
Company of Heroes 2 - The Western Front Armies: Oberkommando West
Spec Ops: The Line
LIMBO
Chaos on Deponia
Deponia
Gone Home With Soundtrack
Goodbye Deponia
Q.U.B.E.: Director's Cut
Skullgirls
Beware Planet Earth!
DeadCore
Platformines
Star Trek
Coin Crypt
Endless Space Emperor Edition
Fallen Enchantress: Legendary Heroes
Freedom Planet
The Incredible Adventures of Van Helsing II
Mercenary Kings
Outland - Special Edition
Sid Meier's Civilization V
Braid
Dustforce DX
Super Meat Boy
World of Goo
Crusader Kings II
Crusader Kings II - Sons of Abraham (DLC)
Hearts of Iron III
"Helping Heart" Paradox Forum Icon
Impire
Knights of Pen & Paper +1 Edition
Magicka
Magicka Wizard Wars Paradox Playtpus Robe
Sengoku
Ship Simulator Extremes
Teleglitch: Die More Edition
Victoria II
War of the Roses: Kingmaker
Bejeweled 3
Dead Space 2
Screencheat
Mass Effect 2
Deus Ex: Human Revolution - Director's Cut
Hitman: Absolution
Kane & Lynch Collection
Lara Croft and the Guardian of Light
Murdered: Soul Suspect
Startopia
Supreme Commander 2
Star Wars: Dark Forces
Star Wars Jedi Knight Dark Forces II
Star Wars Jedi Knight II: Jedi Outcast
Star Wars Jedi Knight: Jedi Academy
Star Wars Knights of the Old Republic II: The Sith Lords
Star Wars Republic Commando
Star Wars: The Force Unleashed II
NiGHTS Into Dreams
Total War: ROME II - Caesar in Gaul (DLC)
Viking: Battle for Asgard
Freddi Fish: Haunted Schoolhouse
Dragon Age: Origins
Pajama Sam: No Need to Hide
Putt-Putt® Goes to the Moon
Putt-Putt® Joins the Parade
Spy Fox in Dry Cereal
The Darkness II
X-COM: Apocalypse
X-COM: Enforcer
X-COM: Interceptor
X-COM: Terror from the Deep
X-COM: UFO Defense
Freddi Fish Missing Kelp Seeds
Guild Wars 2
Guild Wars 2: Heroic Edition
Guild Wars 2: Core game
Awesomenauts Overdrive
keys
CS:GO keys
TF2 keys
almost all games are 1 key, you can choose basically 5 games or maybe more for guild wars!