Metal Slug 4

An organization called "Amadeus" wants to take over all the military computers in the world using a new virus they have created. It's your mission to destroy them before they accomplish their evil ambition.

The 5th episode (including Metal Slug X) of the most famous arcade-shooting-series comes bringing the unaltered classic gameplay, a new arm (Dual Machine Gun), 6 new vehicles (Motorcycle, Truck, Bradley Tank, Metal Crow Tank, Four Legged Walkmachine and Forklift Truck) as well as 2 new soldiers for the pantheon (Nadia Cassel and Trevor Spacey). The most notable introduction to the series is the Metalish System, giving to the player a new possibility to score more points: after pick up certain shield-shape emblems, a timer bar will be displayed at the top of the screen.