Two Annoying Boss Battles

From Nothing But Shooters: "You have a brand new game that you can't seem to tear yourself away from and you were having an absolute blast… until you became stuck on a frustrating boss battle that's preventing you from moving on to the next level or completing the campaign. It's driving you insane and you want to break your controller in half, but damn it, you're not putting it down until you finally get past the bugger, even if takes you all night."