Those of you thinking that Metal Slug X is a brand new game are mistaken, I am afraid to say. It's actually just a little bit bigger and a little bit better version of Metal Slug 2. It was a fine game on it's own, but now you have some slightly altered enemies and new graphics here and there.
It's not a major improvement and almost doesn't justify it's reason to exist. But since I got it included in my Metal Slug Anthology for the Nintendo Wii it's not like I went out of my way to pay extra for it. It's inclusion in this particular package is a mystery since one cannot possible feel the need to play it immediately after Metal Slug 2. SNK should have replaced with Metal Slug Advance at the very least.
A fun shooter nonetheless.