Armstrong in metal gear revengance... Not because he was hard on his own, but because the game bugged on the way to get to him and I couldn't rotate my blade to break the things he was throwing at me.

I got to the boss with a tiny sliver of HP left and spent like 3 hours trying to beat him with it. I THINK I beat it, I don't think there was another phase or something, but during a cutscene that happens after fighting him the game froze... I threw the controller and never turned the game on again lol