Left 4 Dead / Left 4 Dead 2 each (Bundle £2.54) – PC/Steam

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Set in the zombie apocalypse, Left 4 Dead 2 is a co-operative action horror FPS takes you and your friends through the cities, swamps and cemeteries of the Deep South, from Savannah to New Orleans across five expansive campaigns.
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Left 4 Dead: Four survivors battle their way through a zombie apocalypse, fighting hordes of infected while travelling through devastated cities and rural America. Teamwork, weapons and quick thinking are essential as they struggle to reach safety.
Left 4 Dead 2: The sequel introduces five campaigns, new survivors, weapons and special infected. Set across the American South, the group fights through streets, swamps and towns in a desperate journey to escape the relentless zombie hordes.