Metal Slug 4 is a run and gun shooter released for Sony PlayStation 2 in Japan it is the fourth main entry in the series it features fast paced action with detailed sprite graphics it includes four playable characters each with unique abilities and weapons such as pistols machine guns rocket launchers and laser rifles the game introduces new vehicles like the heavy tank and the jet pack the levels have branching paths and hidden items that encourage replayability the soundtrack is energetic and the voice acting adds to the atmosphere the game supports cooperative multiplayer for two players the game also includes a variety of power ups and upgrades it was added to iOctavio com on 2005 03 13