Left 4 Dead


Common

Blow up 20 Infected in a single explosion.

Guides for Pyrotechnician Achievement

TAAAAAAAAAAAANK
Posted: 12 Jul 2014 04:12 pm

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At the start of Dead Air, pipe bombs spawn. Throw one of them down where all of the zombies are, and you should unlock this.

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Developer
Valve Corporation
Publisher
EA Games
Platform
Xbox 360