Here is the full list of all 18 Schwarzerblitz achievements.
Perform 20 or more Trigger Guards (VS or Arcade)
Perform 20 or more Trigger Cancels (VS or Arcade)
Perform 20 or more Trigger Combos (VS or Arcade)
Clear the Prologue in Story mode
Clear Arcade mode with all 16 main characters
Clear the Epilogue in Story mode
Clear Arcade mode once
Clear Survival mode once
Clear Time Attack mode once
Consume 500 or more bullet counters (VS or Arcade)
Perform a 1200+ damage combo (VS or Arcade)
Perform a 40+ hits combo (VS or Arcade)
Clear Tutorial mode
Clear all character Trials