Ed Hunter is a greatest hits album and video game released in 1999 by British heavy metal band Iron Maiden and Synthetic Dimensions respectively. The game objective consists of following Iron Maiden's mascot, Eddie, through various levels depicting the band's past album covers.
The game passes through various levels, starting in London's East End before progressing to a psychiatric hospital, hell, and other various locations, all of which are lifted from the covers of past Iron Maiden albums. While the gameplay itself consists of shooting the appearing enemies with the mouse cursor, it acts as a rail shooter, meaning that the player has no control over movement apart from occasionally choosing the route he will take through the levels.
Source: Wikipedia, "Ed Hunter", available under the CC-BY-SA License.