Free addons and resources for already purchased games:
A Virus Named TOM (Winter Wonderland DLC) [3]: checkout - storefront
Afterfall Insanity Extended Edition (Dirty Arena DLC) [3]: checkout - storefront
Alan Wake (Latin American Spanish Localization DLC) [3]: checkout
Bunch of Heroes (Holiday Pack DLC) [3]: checkout - storefront
Choplifter HD (Zombie Zombie Zombie) [3]: checkout - storefront
Delve Deeper (Gratis Grottos DLC) [3]: checkout - storefront
DmC Devil May Cry (Bloody Palace Mode DLC) [3]: checkout - storefront
Dungeon Defenders (Capture the Flag Pre-Alpha Pass DLC) [3]: checkout - storefront
Dungeon Defenders (Development Kit DLC) [3]: checkout - storefront
Dungeons of Dredmor (You Have To Name The Expansion Pack) [3]: checkout - storefront
Half-Life (high definition models): install - uninstall - comparison
Half-Life 2 Russian Pack (Russian localization by Buka): install - uninstall
Magicka (Free Jolnirs Workshop DLC) [3]: checkout - storefront
Painkiller Hell & Damnation (Satan Claus DLC) [3]: checkout - storefront
Pandora Saga (Beginner's Package and Golden Cloak DLC) [3]: checkout
Pro Evolution Soccer 2013 (Data Pack DLC) [3]: checkout - storefront
RACE 07 (Andy Priaulx Crowne Plaza Raceway DLC) [3]: checkout - storefront
Railworks 2 (Billionaire Benefactor Scenario DLC) [3]: checkout - storefront
Railworks 2 (Keeping Up with the Diesels Scenario DLC) [3]: checkout - storefront
Railworks 2 (Off the Cotswold Line Career System Scenario Pack DLC) [3]: checkout - storefront
Railworks 2 (Port Road Expansion Pack DLC) [3]: checkout - storefront
Railworks 2 (UK Buildings Model Pack DLC) [3]: checkout - storefront
Rocksmith (Holiday Song Pack DLC) [3]: checkout - storefront
Sanctum (X-Mas Carnage DLC) [3]: checkout - storefront
Sanctum (Yogscave Free DLC) [3]: checkout - storefront
Sleeping Dogs (Ghost Pig DLC) [3]: checkout - storefront
Sleeping Dogs (High Resolution Texture Pack DLC) [3]: checkout - storefront
The Elder Scrolls V: Skyrim (Hi-Res Textures) [3]: checkout - storefront
Waking Mars (Soundtrack) [3]: checkout - storefront
Wargame: European Escalation (Commander Free DLC) [3]: checkout - storefront
Wargame: European Escalation (Conquest Free DLC) [3]: checkout - storefront
Wargame: European Escalation (Fatal Error Free DLC) [3]: storefront
Wargame: European Escalation (New Battlefields Free DLC) [3]: checkout - storefront
Worms Ultimate Mayhem (Single Player Pack DLC) [3]: checkout - storefront
X3: Reunion (Bonus Package DLC) [3]: checkout - storefront
Steam delivered MODs:
Age of Chivalry [6]: install - storefront
D.I.P.R.I.P. Warm Up [6]: install - storefront
Darkest Hour (requires Red Orchestra): install - storefront
DayZ Mod [3] (requires ARMA II and ARMA II: Operation Arrowhead): install - checkout - storefront
Defence Alliance 2 (requires Killing Floor): install - storefront
Dystopia [6]: install - storefront
Empires Mod [6]: install - storefront
Eternal Silence [6]: install - storefront
INSURGENCY [6]: install - storefront
Mare Nostrum (requires Red Orchestra): install - storefront
MINERVA (requires Half-Life 2: Episode One): install - storefront
Pirates, Vikings, and Knights II [6]: install - storefront
Smashball [6]: install - storefront
Synergy (requires Half-Life 2): install - storefront
Zombie Panic! Source [6]: install - storefront
Related stuffs:
BioShock: Breaking the Mold [Art]: download - storefront
Company of Heroes: All Heroes Rise OST [OST]: download - storefront
Company of Heroes: Songs From the Front OST [OST]: download - storefront
Garshasp: The Monster Slayer Art Book [Art]: download - storefront
GREED: Black Border OST [OST]: download - storefront
Warhammer 40,000: Dawn of War II OST [OST]: download - storefront
Zombie Movie [PC/MAC][Mov]: install - storefront
Honorable mentions:
Portal 2 Soundtrack [OST]: download - website
Source Filmmaker (beta movie-making tool): install - storefront