With it's co-op shooting, Bullet Bros initially looks like Contra, or Gunstar Heroes, or any other retro game where two bros go guns blazing into a 2D battlefield. But then you see the tanks. And the grappling hooks. And the piggybacks.
The game's loaded with physics, as you can see in the trailer, and also boasts some pretty 2D art, courtesy of creator is Jason Stokes, who I've featured on Fine Art previously.