Hacked Into The Game: A Zombie Apocalypse Thriller from the World of Gameland by Saul Tanpepper

As a deadly virus sweeps across Long Island… and the dead begin to rise.
Twelve years after a terrible experiment nearly wiped out civilization, the Long Island wastelands have been walled off and transformed into a live-action gaming arcade where players can virtually hunt and battle real zombies from the safety of their own homes. Six gamer-hackers, bored to tears and with nothing better to do, decide to sneak onto the island for a little harmless fun. They soon discover that while it’s easy to break in, getting out is a killer.