This is a run of the fourth game in SNK's big franchise, Metal Slug.
x2poet dual-wields Trevor Spacey and Nadia Cassel and conquers General Morden's army like an army of two controlled by a single person!
You can also see more of x2poet's Metal Slug work by looking at his runs of Metal Slug, Metal Slug X, Metal Slug 3 and Metal Slug Advance.