This is a tool-assisted speedrun. For more information, see http://tasvideos.org/2783M.html
Released in 1996, Metal Slug is a widely popular game about two soldiers named Marco Rossi and Tarma Roving, enrolled in the Peregrine Falcon Squad, fighting against General Morden and a bunch of other Nazi impersonators in giant mechs & machines in order to stop his New World Order under his power.
Watch x2poet destroy anything that stands in his path through wide use of bombs and guns, and about