A heavy thud echoed from the hallway outside his front door. Then another. Elias looked at the screen, then at the deadbolt. The thermal dots on his monitor were now pressing against the very wall he was sitting behind.

: Never run executables from unverified peer-to-peer groups.

: Watch for unusual outbound traffic during a "game" session.

Elias stared at the blinking cursor. Outside his apartment window, the city was unnervingly quiet, a stark contrast to the chaotic swarm of the undead he was about to invite onto his hard drive. He knew the risks of "P2P" releases—the shadow-land of peer-to-peer sharing where the line between a free game and a Trojan horse was thinner than a motherboard trace. He clicked the magnet link.