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CsGo, Css, Rust, H1Z1, Skyrim :D

What a scary story, why are you saying something like that?!

regarding the question : the next sales >80% off

Dark Souls, Invisible Inc., XCom, Arma III, Democracy 3

dota 2, dota 2, dota2, dota 2 and bioshock infinite

Counter Strike: Global Offensive (This game pays for itself!)
Portal 2 Valve Complete Pack
Bioshock Infinite
Mirror's Edge
Skyrim The Elder Scrolls Anthology

...Wow I really like FPS games. Who knew.

Lifeless Planet
Remember Me
The Vanishing of Ethan Carter
Papo & Yo
Fahrenheit

Fallout: New Vegas, TES III:Morrowind, Half-Life 2, Age of Empires II, Silent Hill 2.

and i did bought those games twice. except hl2, wich i won here xd

CS:GO , The Forest, Far cry franchise, Skyrim Legendary Edition, Outlast with the DLC

Just Cause 2, Audiosurf, Portal 2, [insert twin-stick shooter here], ...a platformer?

Terraria
Bioshock Infinite or Dishonored
Trine 2
Borderlands 2
The Darkness 2
At least based on their fun-content after 2-3 walkthroughs, on a very long term obviously I'd go with CIV or CXOM instead of Darkness 2 and Bioshock Infinite. These were amongst the most fun games I've played, but re-buying... not exactly sure, as most of them don't really have replay value.

The Swapper
The Walking Dead S1&2
Tomb Raider (2013)
Enslaved: Odyssey to the West
Max: The Curse of Brotherhood (and so SO many more! I love my games! ♥_♥ )

Dawn of war, Dawn of war 2, Home world(i bought both games twice already) Far cry Blood dragon and skyrim

CS:GO, Rising Storm, Sengoku, Way of the Samurai 4 and Total War Rome 2

Fallout 1, 2, Fallout New Vegas, Half Life and Half Life 2, The witcher (which I purchased two times), Borderlands (hmmmm maybe not now, but yet again... I have purchased this game twice... Ohhh good old times :( )

Ahhh! Dark souls and Terraria too. Very very very very good games.

AAHhh!! Kotor and Kotor 2. Jedi Outcast!!

CS:GO, Dark Souls: PTDE, Half-Life 2, Bulletstorm, Star Wars: Knights of the Old Republic

Saints Row Franchise, Sleeping Dogs. LEGO Franchise, SAW and South Park.

Sang-Froid - Tales of Werewolves
Lilly and Sasha: Curse of the Immortals
Hero of the Kingdom
Deponia
Edna & Harvey: Harvey's New Eyes

I actually bought them much more than again.

.....oh shit, you are not asking for DID <O>

Audiosurf 2
Saints Row Franchise
Dark Souls
Robot Roller-Derby Disco Dodgeball
Grand Theft Auto V

仙剑奇侠传
新仙剑奇侠传
轩辕剑三
轩辕剑三外传： 天之痕
and
轩辕剑外传：苍之涛
I would buy these again, repeatedly, even if I don't lose my current copies of each.

Garry's Mod
ArmA 3
Payday 2
Sonic & All-Stars Racing Transformed
Duck Game

to the moon
age of wonders 3
age of empires
deponia series
minecraft

First of all... WTF???? That is a scary thought, dude. It's fucking sadistic of you to ask such a thing. It sent chills down my spine...

But the answer is this: BIoshock, Bioshock, Bioshock, BIoshock and...oh yeah, BIOSHOCK!!!!!! In case you haven't noticed, I REALLY like Bioshock. It's my favorite game EVAH. But I'd also buy S.T.A.L.K.E.R - Shadow of Chernobyl, Half Life 2, Spec Ops The Line and Max Payne 2.

The Elder Scrolls V: Skyrim. High replayability.
Borderlands 2. High replayability.
RPG Maker VX Ace. Then maybe I'd finally get off my ass and finish that project I was working on...
Counter-Strike: Global Offensive. Gotta have some multiplayer, even though my internet is shit.
Just Cause 2. Because why the fuck not.

Not necessarily even my favorites, but without any other games for the time being GMod, Skyrim, Rocket League, Civ V, and either TF2 or CK2 or something, all because I could spend a lot of time in them (and get a lot of different experiences out of GMod and Skyrim.

Black Flag, although I haven't played it yet, might sneak in there, because I've already spent like 40 in AC3, and Dishonored is close just by its merits as a game in general, plus it bears replaying.

Terraria
Mount and Blade: Warband
Resident Evil Anthology
XCOM: Enemy Unknown
Skyrim