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		Half-Life: Gunman Chronicles (Add on) for Windows, Mac Genre: Action, Publisher: Sierra Online, Inc., Pl ... Read more Genre: Action, Publisher: Sierra Online, Inc., Platform(s): Windows, Mac, ESRB Rating: M - (Mature), Media: CD-ROM Minimize See Details  |  See Product Specs		from $28 (2 stores) See Details
		Half-Life: Opposing Force (Add on) for Windows   (286) Genre: Action, Publisher: Sierra Online, Inc., Pl ... Read more Genre: Action, Publisher: Sierra Online, Inc., Platform(s): Windows, ESRB Rating: M - (Mature), Media: CD-ROM Minimize See Details  |  Read Reviews  |  See Product Specs		from $36 (1 store) See Details
		Half-Life: Counter-Strike (Add on) for Windows   (24) Genre: Action, Publisher: Sierra Online, Inc., Pl ... Read more Genre: Action, Publisher: Sierra Online, Inc., Platform(s): Windows, ESRB Rating: M - (Mature), Media: CD-ROM Minimize See Details  |  Read Reviews  |  See Product Specs		from $37 (1 store) See Details
		Half-Life Platinum Collection (Pack)   (3) Genre: Action, Publisher: Sierra Online, Inc., ES ... Read more Genre: Action, Publisher: Sierra Online, Inc., ESRB Rating: M - (Mature), Media: CD-ROM Minimize See Details  |  Read Reviews  |  See Product Specs		from $203 (1 store) See Details
		Half-Life: Game of the Year Edition (Pack) for Windows   (4) Genre: Action, Publisher: Sierra Online, Inc., Pl ... Read more Genre: Action, Publisher: Sierra Online, Inc., Platform(s): Windows, ESRB Rating: M - (Mature), Media: CD-ROM Minimize See Details  |  Read Reviews  |  See Product Specs		from $90 (1 store) See Details
		Half-Life: Blue Shift (Add on)   (21) Genre: Action, Publisher: Sierra Online, Inc., ES ... Read more Genre: Action, Publisher: Sierra Online, Inc., ESRB Rating: M - (Mature), Media: CD-ROM Minimize See Details  |  Read Reviews  |  See Product Specs		from $74 (1 store) See Details

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