Wolf Pack
Include: Return to Castle Wolfenstein, Spear of Destiny, Wolfenstein 3D
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The Hitman Collection
Include: Hitman 2: Silent Assassin, Hitman: Blood Money, Hitman: Codename 47
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Serious Sam Complete Pack (http://store.steampowered.com/sub/17410/)
Include: Serious Sam HD: The First Encounter, Serious Sam HD: The Second Encounter - Demo, Serious Sam HD: The Second Encounter, Serious Sam Classic: The First Encounter, Serious Sam Classic: The Second Encounter, Serious Sam 3: BFE, Serious Sam Double D, Serious Sam 3: BFE Bonus Pack, Serious Sam: The Random Encounter, Serious Sam 2
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THQ Collection
Include: Company of Heroes, Company of Heroes: Opposing Fronts, Darksiders II, Darksiders™, Dawn of War II: Retribution – The Last Standalone, Metro 2033, MX vs ATV Reflex, Red Faction, Red Faction II, Red Faction®: Armageddon™, Saints Row 2, Saints Row: The Third, Supreme Commander, Supreme Commander: Forged Alliance, Titan Quest, Titan Quest - Immortal Throne, Warhammer 40,000: Dawn of War II: Retribution, Warhammer 40,000: Space Marine, Warhammer® 40,000™: Dawn of War® II, Warhammer® 40,000: Dawn of War® II Chaos Rising
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[H]Valve Complete Pack [W] offers in dota keys
Valve Complete Pack :
Counter-Strike, Counter-Strike: Condition Zero, Counter-Strike: Global Offensive, Counter-Strike: Source, Day of Defeat, Day of Defeat: Source, Deathmatch Classic, Half-Life, Half-Life 2, Half-Life 2: Deathmatch, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life 2: Lost Coast, Half-Life Deathmatch: Source, Half-Life: Blue Shift, Half-Life: Opposing Force, Half-Life: Source, Left 4 Dead, Left 4 Dead 2, Portal, Portal 2, Ricochet, Team Fortress 2, Team Fortress Classic