Child of Eden

You have to get over 800,000 points in the Beauty Archive on Hard Difficulty Mode. Here's a video that help as a guide.
You should be around these points in each part of the Archive:

- Part I (2:45): 129.000 pts.
- Part II (4:40): 211.500 pts.
- Part III - Tunnel (5:52): 322.500 pts.
- Part IV - Final Boss: 800.000 pts.

That's an approximated score in each part if you use all three special powers. If you manage to conserve one you'll score 25.000 pts. more. If you conserve two (like I did) you'll score 50.000 pts. And if you conserve all three you'll score 100.000 pts. more.
So you can be under these scores but still make it through.

To get a good score:
PART ONE:
- The butterflies (at 1:20, for example) spread their wings three times so you have three opportunities to kill them. You can kill one of them with one octa-lock.
- From these plants (1:50) emerge 8 enemies. DON’T kill the green plant before it expels all the enemies because then you’ll be losing much score. Try to kill these 8 enemies with one octa-lock.

PART TWO:
- You know you’ve killed a worm (at 2:55, for example) when it disappears and it leaves a blue glow in the screen (3:10)
- You have to use the purple shot on this purple enemy (3:20). When it begins to spin you have to shoot its tips with the normal shot. Purple enemies has eight tips, if you want you can use one octa-lock on them. If you’re not fast enough, it shoots you, so be careful.

PART THREE:
- You have to be fast when you kill the enemies here because they hide as soon as they can.

PART FOUR – FINAL BOSS:
- You can only hurt the boss when the core is open (red color).
- Pay special attention when the boss shoots you purple shots. They have ALWAYS priority over the core.
- A lot of points depends on the final boss. Try to do all the x8 combos you can.
- Be especially careful when you get to the 11:08 part. It’s one of the latest parts; we are very excited and tired because we are finishing the stage, but here we have a good chance of dying. After this part, the only thing you have to worry about is keeping your x8 combo for score, so focus on it.
- When final boss hits you once, you lose two bars.

GENERAL TIPS:
- You have to do many "x8 combo" (this requires a nice rhythm in most part of the level). Take it easy and try to listen to the music.
- You don’t need to kill 100% for this achievement, but if you kill many enemies they’ll give you more score.
- Many enemies seem to go very fast and you may think you don't have enough time to kill them (and do a x8 combo?... no way!) Relax and practice, try to listen to the rhythm and try to move faster & faster. It's not impossible; over time you'll realize that you're doing better, trust me.

I hope these tips can be useful to improve your score :)

I've created a gold star guide for Beauty Hard, going over the pitfalls of the area and generally how I went about it. For the purpose of this achievement, you don't have to get 100% purification, so you may want to go for octalocks whenever possible, since the points you get from spamming just won't give you much.