Any help with a few Achievements i have left?

[Rye]

I have the following left ... are any of these super easy and I'm just overlooking something?

Smackdown! Achieve a combo of 20
And then there were none Deal 10 billion or more dmg
Geo Master Completely clear a geo chain of 5 or more
Hall of Famer completely beat Martial Arts Tournament
Overlord achieve total victory in Demon Shogi
Generation Zessho clear Postlude: Zessho
Rosen Queen Regular achieve top customer rank
Into Legend Obtain a legendary weapon


thanks for any help or links Dood!

[mimizukari]

hall of famer & overlord are pretty obvious, fully clear all stages. 10 bil, zessho, rosenqueen will all occur as u play the game normally.

if u don't have zessho it means u haven't been to path of carnage yet, so get on that and your stats will start skyrocketing.