Metal Slug is an action platform video game developed and released by Nazca Corporation and later published by SNK. It was originally released in 1996 for the Neo Geo MVS arcade platform and was converted to Neo Geo AES. The game features fast action with tons of colourful sprites and animations. The player must shoot constantly at enemies in order to reach the end of each level. At the end of each level, the player encounters a boss, who is usually larger and tougher than regular enemies. In each level, the player can find numerous weapon upgrades and "Metal Slug" tanks. The tank is known as the SV-001 which increases the player's offense and adds to their defense. In addition to shooting, the player can also perform melee attacks by using a knife. The player does not die simply by coming into contact with enemies but a single shot is enough to die. The AES version of Metal Slug is considered to be one of the most expensive video games in the history.