Tales of Vesperia
50 Achievements
1,000
120-150h
Secret Mission 17
VS. Yeager. Made his heart explode using Raven's Rain arte. Details for this achievement will be revealed once unlocked
5
How to unlock the Secret Mission 17 achievement in Tales of Vesperia - Definitive Guide
Found a great link to a video someone made!
I was having a fucking hell of a time with this before that video.
After watching it i did it my second try. thank god for youtube.
In my case, Raven already learned the Crucible skill, thus he was shooting rainsong regardless of his weapon. Deactivate this skill in the skill menu and make sure that Raven is not using a weapon with Crucible. After knowing this, got the achievement in the first try.
This is the method that got me the achievement:
During the second half of the fight (after he reveals his heart), take control of Raven. Make sure you don't have any weapons or skills equipped that will alter your artes (you want normal Rain, not Rainsong). Keep your allies at their normal strategies and back up, making sure Yeager is facing you. Now go into Overlimit (having synthesized the Quatro for level 4 will help) and simply spam your Rain arte over and over and over. Your allies should add in some melee strikes and eventually he will go into a hunched over state where he is catching his breath. Since you are spamming Rain, it should have no problem hitting him directly after he does this. Since your allies are up close, they may hit him first, so use some Limit Bottles and try again until it works.
This youtube video seems to be an easy way as well, but I never tried it. Watch the video and click "more info" to read about his setup and exactly what he did.