Radline

"Radline: Quarantine is a fast-paced action game that can be played as a single-player or with up to 5 players in online co-op mode. Customizable characters, unlockable items, and a rank system are available, along with a variety of weapons and tools such as sentry turrets, tesla coils, traps, and barricades to aid in fighting off hordes of infected. Team up with friends and survive together in a quarantined area infected by an unknown virus."