Here is the full list of all 19 Blaster Master Zero 3 achievements.
Unlock all other achievement.
Master the Gaia System.
Obtain every item.
Defeat the Metal Attacker in the 1st Area.
Defeat the final boss as Kane.
See the true ending.
Defeat the final boss as Jason.
Defeat Rising Garuda.
See the normal ending.
Defeat the boss mutant in the Forbidden Sector.
Become a frequent user of the VRV system and acclimate to super-dimensional space.
Defeat the boss mutant on planet Stranga.
Defeat the boss mutant in the NORA Satellite Zone.
Defeat the boss mutant in the Mass Driver Facility.
Defeat the boss mutant in the Sophia Metropolis.
Clear an SF dungeon in super-dimensional space.
Activate the VRV system for the first time.
Use the warp feature at a retry point.
Battle against the Metal Attacker.