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[PC - Humble Bundle] Killing Floor FREE

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The co-op survival horror game by Tripwire Interactive is being given away by Humble Bundle for a limited time. This key is to be activated on Steam, and must be activated by the 2nd of July, 2017 at 3am AEST else it will become invalid.

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Referrer receives $11 AUD in Wallet Credit for the first 30 brand new subscribers that signup for Humble Choice after clicking on a referral link.

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