Ooops, my bad! I just searched "the king of fighters" on Steam, but didn't bother to check each game individually. :P

To be added

Crysis series
Crysis 2
Crysis 3

Dead Space series
Dead Space 2
Dead Space 3

Dragon Age series
Dragon Age II
Dragon Age Inquisition

Mirror's Edge series
Mirror's Edge Catalyst

All changes made by you awesome people has been made. I'm still trying to get the list up to date so any help is appreciated!

Removed:
Caesar
Caesar II
Caesar IV
Emperor: Rise of the Middle Kingdom
Indiana Jones and The Last Crusade: The Graphic Adventure
Pilot Brothers series:
Pilot Brothers 2
Pilot Brothers 3: Back Side of the Earth
Sid Meier's Pirates! (2004)
Saints Row IV
Saints Row: Gat out of Hell
Shadow Warrior: Classic Redux
SimCity 3000 Unlimited
Torchlight 2
Turok 2: Seeds Of Evil
Vampire: The Masquerade - Bloodlines
Worms Armageddon
Civilization IV: Colonization
Starwars - Shadows of the Empire
Star Wolves 3: Civil War
Age of Pirates: Caribbean Tales
Age of Pirates 2: City of Abandoned Ships
Sherlock Holmes: The Awakened (Remastered Edition)
Sherlock Holmes versus Arsène Lupin (Remastered Edition)
Sherlock Holmes versus Jack the Ripper
The Testament of Sherlock Holmes

Added:
Deus Ex: Mankind Divided
Lara Croft GO
Sid Meier's Civilization V
Sid Meier's Civilization Beyond Earth
Sid Meier's Civilization VI
Real Bout Fatal Fury 2: The Newcomers
Garou: Mark of the Wolves
The King of Fighters '98 Ultimate Match
The King of Fighters 2002 Unlimited Match
The King of Fighters XIII
Shock Troopers: 2nd Squad
Sherlock Holmes: The Devil's Daughter
Crysis 2
Crysis 3
Dead Space 2
Dead Space 3
Dragon Age II
Dragon Age Inquisition
Mirror's Edge Catalyst

I've also made one "big" change with the list; I won't include games that's already here (aka s.k. "original" inferior versions of games, for example Grim Fandango, Monkey Island, etc.). If anyone thinks that this change is totally out of the blue and very unjustified, please tell me so. I've also decided to remove MP-only games (Banner Saga: Factions in mind).

List is now updated up to and including June 6th 2016 (with some minor later additions).

Since Vampire the Masquerade games are part of the World of Darkness universe:
Added
World of Darkness Preludes: Vampire and Mage

Add Skyrim Special Edition to the list
Add Rollercoaster Tycoon World
Add Fusion version of Serious Sam HD TFE, TSE and BFE.

Medal of Honour: Pacific Assault is on GOG
Painkiler Overdose is here.
Metro Last Light Redux is on GOG, which is basically just a GOTY edition of Metro Last Light

La Mulana freeware version being in here is a bit silly imho considering it's freeware.

The new Shadowgate lets you set an oldschool mode that makes it (exactly?) as it was (far as I know)

Banner Saga Factions can't come to GOG.
Online only, mp only game.

Add Serious Sam Revolution. (updated version and combined launcher for Serious Sam Classic)

Thank you Omega!

Also noting: I will keep Metro 2033 on the list since it's extremly different from it's Redux version

Removed
Medal of Honour: Pacific Assault
Painkiler Overdose
Metro Last Light
La Mulana
Shadowgate
Banner Saga Factions

Added
The Elder Scrolls V: Skyrim Special Edition
The Elder Scrolls: Legends
Rollercoaster Tycoon World
Serious Sam Fusion
Serious Sam Revolution

Add Alien Shooter TD Add BlazBlue Centralfiction

Add Carmageddon: Max Damage Add Sid Meier's Civilization, Sid Meier's Civilization II, Civilization II: Test of Time (an alternative version of Civilization 2) and Sid Meier's Starships (it's the same universe as Civilization: Beyond Earth). Cossacks II and its expansion are already here, so the Cossacks section can be removed from the list. Add .<div class="quot quot_text normal_color "><div class="small_avatar_2_h"><img src="//images.gog.com/726ac3d0fced06418aeac1e29ef46f901a7e41d10f4ac5bab91cb5af85f89dee_avm.jpg" width="16" height="16" alt="avatar" /></div><span class="quot_text"><span class="quot_user_name">Prah: </span></span><span class="bold">Double Dragon series:</span> <a href="http://www.gog.com/forum/general/completionists_list_of_missing_games_from_gog_series_v2/post3" class="link_arrow"></a></div> Add [url=http://store.steampowered.com/app/528610/Double_Dragon_IV/]Double Dragon IV.

Add Wildlands. Arcania is here now, so the section can be removed. There is no longer any Guilty Gear games here, so the section will have to removed. Neptunia 2 and 3 Rebirth are already here, so they can be removed and 4 more games can be added:
Hyperdevotion Noire: Goddess Black Heart
Hyperdimension Neptunia U: Action Unleashed
Megadimension Neptunia VII
Megatagmension Blanc: Neptune vs Zombies

Add LEGO Worlds and LEGO City Undercover. Add LEGO STAR WARS: The Force Awakens Add Lucius Demake. Add Assault Squad 2: Men of War Origins Add Moto Racer 4. Add Pro Pinball Ultra (a remake of Pro Pinball Timeshock). It's already here, along with its expansion.

Add Sniper Elite 4.

It's already here, so it can be removed. With the removal of Race Driver: GRID, the section will have to be removed. The following games can be added:
Eisenhorn: XENOS
Space Hulk: Deathwing
Dawn of War III It's already here, so it can be removed. A remastered version is already here. Should it stay?

Thank you Grargar!

Removed
Cossacks series
Gothic series
Guilty Gear series
Hyperdimension Neptunia 2
Hyperdimension Neptunia 3 Rebirth
SimCity 3000
SWAT series
TOCA Touring Car series
Worms Armageddon
Worms World Party

Added
Alien Shooter TD
BlazBlue Centralfiction
Carmageddon: Max Damage
Sid Meier's Civilization
Sid Meier's Civilization II
Civilization II: Test of Time
Sid Meier's Starships
DOOM (2016)
Double Dragon IV
Tom Clancy's Ghost Recon Wildlands
Hyperdevotion Noire: Goddess Black Heart
Hyperdimension Neptunia U: Action Unleashed
Megadimension Neptunia VII
Megatagmension Blanc: Neptune vs Zombies
LEGO Worlds
LEGO City Undercover
LEGO STAR WARS: The Force Awakens
Lucius Demake
Assault Squad 2: Men of War Origins
Moto Racer 4
Pro Pinball Ultra
Sniper Elite 4
Eisenhorn: XENOS
Space Hulk: Deathwing
Dawn of War III

List is now updated up to and including September 11th 2016 (with some minor later additions).

List should now be up to date! I will add wishlist entries every now and then.