Undead Unleashed is a Third Person Shooter, browser-based game developed by Sony to advertise Resident Evil: Retribution.
The player, as Janus Prospero, will move around a three-dimensional map, shooting at an endless number of zombies while timer counts down to 0:00. Upon reaching 0:00, the player will be evacuated, and the game will end. With the inclusion of boosters to extend the length of the game (and allow more points to be earned), it is inspired by "The Mercenaries". The three available maps are "Tokyo"; "New York" and "Moscow".