Here is the full list of all 29 Zero Strain achievements.
Complete Kolusia Spire stage
Complete Xelia Crater 2 stage
Beat Reactor Core
Beat Hu Gaku
Complete Downfall Well 2 stage
Beat Eternity
Complete Leytharus Night stage
Beat Hu Kora
Complete Xelia Crater stage
Beat Imperious
Complete Downfall Well stage
Beat Reaper
Complete Leytharus Night 2 stage
Beat Marionette
Beat The End
Complete Downfall Well Omega
Beat Imperious Omega
Beat Hu Kora Omega
Complete Leytharus Night Omega
Beat Eternity Omega
Complete Downfall Well 2 Omega
Beat Reactor Core Omega
Beat Hu Gaku Omega
Complete Kolusia Spire Omega
Beat Reaper Omega
Beat Marionette Omega
Beat The End Omega
Unlock all catalysts
Beat everything