This combination pack offers the same side-scrolling action that the series has been known for. Metal Slug 4 is set in the year 20XX, and shows the team blasting through Morden's forces yet again as they attempt to prevent a computer virus that is allowing Morden to hijack the military hardware of all the world's armed forces. Comparably, Metal Slug 5 pits the team against a paramilitary group known as the Ptolemic Army, which has stolen a disc comprising secrets about the Metal Slug program. Both games offer hidden areas and alternate paths, screen-dominating boss battles, and an outlandish lineup of weapons and vehicles. Metal Slug 4 & 5 both offer four characters from which to choose. Metal Slug characters Marco and Fio return in both games, while positions three and four are filled by