Green Man Gaming’s Summer Sale has kicked off with a nice collection of cheap zombie-themed games, including H1Z1, The Walking Dead, Left 4 Dead, and more. The prices are great, and you can also save an extra 20% with code GRAB20-PERCNT-OFFNOW. [Green Man Gaming’s Summer Sale has Started - Zombie Games are Deeply Discounted, Extra 20% Off w/ Code GRAB20-PERCNT-OFFNOW]

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