Metal Slug 3 (NGM-2560)

The gameplay mechanics are the same as in previous Metal Slug games; the player 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 called the SV-001 (SV stands for "Super Vehicle"). It makes the player's offense and defense much stronger. 
In addition to shooting, the player can perform melee attacks by using a knife and/or kicking. The player does not die by coming into contact with enemies, and correspondingly, many of the enemy troops have melee attacks. Much of the game's scenery is destructible, and occasionally, this reveals extra items or power-ups.

Use arrow key and try some key ( Shift, Enter, Z, X, A, S , Q, E, R, T, G, F, H ) to controls the game.