Quantum Theory

Release
Defeat Diablosis Soma (Thanatos III) on Hard in 3 minutes 30 seconds or less.

*The text guide is largely predicated upon bleap's guide I found on xbox360achievements.com. I have added improvements from my experience.*
**Video at the bottom is by KingSuperOne.**
At the end of Scene 12, Thanatos goes through a second transformation into a big huge ugly thing. This is definitely a very tough fight as not only can he damage you with his arm sweeps and punches, there are tiny bot things that shoot at you all the time. His weak points are the orange spots around his body. If you see juice squirting out of the spot, it means you’re hitting it for maximum damage as opposed to minimal damage if nothing is coming out.

Right infront where you begin is the 1st spot. Destroy the first spot, and then run up (hold ) the winding path to your right, if you have enough ammo, avoid picking up the MG on the way. Stick to the right wall to avoid an incoming arm that will hit you very hard.

You will come to an obstacle that you need to jump over and high wall on your left. Here you should be able to see the 2nd Spot just under the arm nearest to you. He will move back the arm and the spot will move away, but you still should be able to target it. He will be swinging his arm but if you stayed at the spot where you jumped over you should be able to avoid it. Once his arm has passed immediately move forward but don’t jump over the next obstacle, look to your left and you can target the spot, burst it.

Next, jump over the obstacle and quickly race away while picking up the ammo box on the way. Remember you can reload and run at the same time. The 3rd spot is again under one of the arms and there will be a high wall that you can use for cover. Stay on the left side of the wall and shoot it, if he grabs the high wall, run to the right side. If he lifts his arm instead, stay on the left as he will be punching the right side.

Destroy the 3rd spot, jump the gap and you’ll come across a shotgun before another gap. Jump this second gap, and now you can see his face. The 4th spot is on his left arm up here. Again there’s a high wall for cover, stay on the right side and you’ll be able to target the weak spot. When he pulls back his arm, he’s about to punch the right side of the wall, so roll away.

Once done, race up and away, leap over an obstacle, and then you will come to the back of his head. There should be two high walls with a lower wall in between. The 5th and final spot is behind his neck. Run to the far high wall as you have a better angle and his attach will come down in between the two high walls.
**I would advise that you play through the level on easy and have your Venom MG fully loaded and selected when you defeat Chaos to bring you to this fight and save a few extra seconds.**
Best of luck as this is a VERY, VERY difficult achievement and one that will have you repeatedly trying to shave time.