Metal Slug 3 (メタルスラッグ 3) is a run and gun video game developed by SNK. It was originally released in 2000 for the Neo-Geo MVS arcade platform as the sequel to Metal Slug 2/Metal Slug X. The music of the game was developed by Noise Factory. The game was later ported to the PlayStation 2, Xbox, Xbox Live Arcade, Virtual Console, Microsoft Windows, iOS, Android, Wii, PlayStation Portable, PlayStation 3, PlayStation 4, PlayStation Vita, and Nintendo Switch. The game added several new features to the gameplay of the original Metal Slug and Metal Slug 2, such as new weapons and vehicles, as well as introducing branching paths into the series. It received generally positive reviews.
The gameplay mechanics are the same as in previous Metal Slug games; the player(s) must shoot constantly at a continual stream of enemies in order to reach the end of each level. At this point, the player confronts a boss, who is usually considerably larger and tougher than regular enemies. On the way through each level, the player can find numerous weapon upgrades and “Metal Slug” tanks. The tank is known as the SV-001 (“SV” stands for Super Vehicle), which not only increases the player’s offense, but considerably adds to their defense.
In addition to shooting, the player can also perform melee attacks by using a knife and/or kicking. The player does not die simply by coming into contact with enemies, and correspondingly, many of the enemy troops also have melee attacks. Much of the game’s scenery is also destructible, and occasionally, this reveals extra items or power-ups, although most of the time it simply results in collateral damage.