This action game is extremely goofy and makes no attempts at all to take itself seriously. It is what it is, and it's very comfortable being what it is. It's a lot of fun to set loose and rescue your fellow bros and see which other characters from popular movies make appearances (Rambo is Rambro, the Terminator is the Brominator, and so on), but it's also necessary to do so because after one hit, one bro falls and the other takes his place -- in other words, each person you find counts as an extra life or try in each stage. And while the stages don't change all that much, they do noticeably ratchet up in difficulty in planting more obstacles and tougher enemies between you and your ultimate goal: to make it to the end of the stage, defeat the demon boss or bigger boss, plant an American flag, and ride a helicopter out while an electric guitar shreds, signaling your victory.
There's never anything else going on here, which isn't necessarily good or bad -- it's just that it cuts both ways. The game gets much more chaotic in multiplayer, where you have four bros wandering around the screen, setting off chain-reaction explosions and filling the screen with bullets, and in that sense, the game is a lot of laughs and a goofy excuse to run and gun and jump around. If you're looking for something else a little deeper, this isn't the game for you. But if you're looking for something a little mindless in a good way, Broforce is one to check out.