Here is the full list of all 20 Devastator achievements.
Trigger 50 Quadrant Morphs
Warp-Kill Viruses 5 times
Get C-Ranks Or Higher - Any Mode 3 times
Complete Any Cycle - No Continues
Complete Cycle I
Get a High Score In Standard - 500,000
System Clear - Quadrants
Trigger 10 Quadrant Morphs - One Game
Max Out Turbo 5 times
Use Blast 20 times
SCORE - TOTAL (1,000,000)
Get a High Score In Elite - 500,000
Get Destroyed 10 times
Collect 25 Shield Pods
Complete 25 Waves Or Phases
Collect 3 Interrupts
Get An S-Rank - Any Mode
Complete Any Sector - No Continues
Complete Sector I
Destroy 1000 Viruses