We're talking Metal Slug here. It's completely linear game. Once you complete it, you have seen it all. Well, there are 2 branching paths you can take on some

We're talking Metal Slug here. It's completely linear game. Once you complete it, you have seen it all. Well, there are 2 branching paths you can take on some levels, so you should play the game twice to see it all. But that is it, once you played it twice, there's nothing new to see or explore.