After giving it a bit of thought, I have to agree with Monodiaboloco about the knight from Ghouls'n'ghosts being the biggest badass since he is driven by next to nothing but will fight on through hordes of enemies and countless traps with just taking a couple of hits being all it takes to put him in a grave. In spite of Ghouls'n'Ghosts,I personally would've gone with the main character from Earth Defence Force 2017, seriously, sure any badass demon decendant of Sparda can go and save the world and laugh his ass off when all tables are turned against him (I am talking about Dante if you don't get it). But someone who loses all his comrades in a fight after a few seconds and still manages to win even though all the shit around him is 10-100,000+ times his size and he only has a rocket launcher and a rifle to fight them all off. He also can level a whole block with a grenade is quite simply the badass. Sure, you can go with Goku since he can blow up a planet if he ever does a spirit bomb, or ryu cus he got flung into a wall and comes out swinging, or Big Boss since he will perform operation on himself without any painkillers on the spot while in combat, maybe even kratos just because he has been to hell and back and kills gods (you might as well give Ryu from Breath of Fire 2 credit for killing a god, and cloud from final fantasy for killing a person who made himself into a god, Ramzey in Final Fantasy Tactics just straight up goes into hell and kills the god of everything, Ryudo from Grandia II kills a god, hell, even the lil kids from the Golden Compass kill God.. point is god killing is nothing special), and saying Master Cheif is a badass is just a bad joke.. his suit is what is badass.. same with Samus from Metroid, Link is quite the badass too.. sure he gets hit alot by his enemies but when he killed Ganondorf in Wind Waker, I can't help but get chills, just a little kid fucking ramming that sword in his skull= HOLYSHIZZ. Bottom line is the heroes who decimate entire legions and are on the brink of being struck down by a slight touch and arn't blessed with incredible strength, or skills, or gear, or training are the ones who just bury the needle on the bad-ass-o-meter.