List items
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC (Half-life 2, Half-life 2: Episode 1, Half-life 2: Episode 2, Team Fortress 2, Portal)
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PC
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PC
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PC (CD)
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PC (CD)
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PS1
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PS1
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PSP
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PS1
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PS1
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PS2
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PSP
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PS1
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PS1
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PS2
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PS2
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC ($5)
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Special Edition, PC & iPhone
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Special Edition, PC & iPhone
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PC
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PC
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PC
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Deluxe, PC & iPhone
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PC, iPhone
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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PC
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Enhanced Edition, PC
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PC
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PS2
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PS2
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PS2
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Dreamcast
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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PC
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PC & PS2
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PS2
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PS2
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PS2
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PS2
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PS2 (unopened)
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PS2
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US, Dreamcast
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Dreamcast
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PS2
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PS2
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PS2
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PS1
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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PS2
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Limited Edition, PS2
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PS2
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PS2
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PS2
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