The water gun version of Metal Slug invincible version is a different type of Metal Slug shooting game. This their mission Battle of children with a group of evil, a place called the Gold Coast, a group of evil children to the occupation, they always bully the weak, took away more than their small child toys. Want those kids to get some of the lessons, come together and their adventure! This game is invincible version of life unlimited, mine is infinitely more so that you also read the first time to play Metal Slug memories.