I think the explosions are from metal slug,also when you damage zombies it sounds like if you slash an enemy in Metal slug,am i right?
A really fun and addicting game,great for passing the time until "meet the pyro" comes out :)
Better than the first! :)
Meh..... pretty decent shooter & bosses add variety but what I love is the guns, GUNS GUNS GUNS, sooooooooooo MAN HAHAHA!!!
This was a VERY addicting game, I loved it, as it was just shy of perfect.