Scarlet Devil Mansion is hosting some kind of airsoft game/tournament. The guns are fake, but the acting is real and meant to be overly-dramatic. Specifically, the scenes are meant to mirror scenes from other well known action movies (i.e. Black Hawk Down, Act of Valor, etc.)
It's actually a whole bunch of movies. For the scenes I can actually name, A-Team the music with computer, X-Men origins Wolverine for the sword scene, Hot Shots for the scene with the number that kept increasing... There's also Expendables, Act of Valor, Black Hawk Down, Rambo, and I so many more. It might be the Matrix for the knife fight.... It has been so long since I have seen any of those movies, so I can't be sure.