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gptkbp:instance_of
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gptkb:game_developers
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gptkbp:awards
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gptkb:BAFTA_Games_Award_for_Best_Game
Game Developers Choice Award for Best Game
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gptkbp:contains
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gptkb:Portal
gptkb:Team_Fortress_2
gptkb:Half-Life_2
gptkb:Half-Life_2:_Episode_One
gptkb:Half-Life_2:_Episode_Two
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gptkbp:critical_reception
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Highly acclaimed
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gptkbp:developed_by
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gptkb:Valve_Corporation
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gptkbp:engine
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gptkb:Source_engine
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gptkbp:features
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gptkb:Achievements
gptkb:voice_acting
Narrative-driven gameplay
Multiplayer modes
Single-player campaigns
Rich storytelling
Mod support
Varied environments
Innovative game mechanics
Challenging AI
Character development in Half-Life 2
Cooperative gameplay in Team Fortress 2
Customizable characters in Team Fortress 2
Physics-based puzzles in Portal
Steam integration
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gptkbp:genre
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gptkb:Puzzle
gptkb:first-person_shooter
Multiplayer
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gptkbp:has_sequel
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gptkb:Half-Life_2:_Episode_Three
gptkb:Portal_2
Team Fortress 2 updates
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https://www.w3.org/2000/01/rdf-schema#label
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The Orange Box
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gptkbp:influenced
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Subsequent first-person shooters
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gptkbp:inspired
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gptkb:Portal_2
Half-Life 3 speculation
Team Fortress 2 updates
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gptkbp:is_available_on
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gptkb:Play_Station_Network
gptkb:Xbox_Live
gptkb:Steam
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gptkbp:is_notable_for
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gptkb:Cultural_impact
Innovative gameplay
Strong narrative
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gptkbp:is_part_of
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gptkb:Half-Life_series
gptkb:Portal_series
gptkb:Team_Fortress_series
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gptkbp:mode
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Multiplayer
Single-player
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gptkbp:platforms
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gptkb:Play_Station_3
gptkb:Xbox_360
gptkb:Windows
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gptkbp:released_on
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October 10, 2007
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gptkbp:sales
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Over 1 million copies sold in first week
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gptkbp:bfsParent
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gptkb:Portal
gptkb:Richard_Tuttle
gptkb:Valve_Corporation
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gptkbp:bfsLayer
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4
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