Here is the full list of all 29 Assault Android Cactus achievements.
Earn an S+ ranking on all campaign levels
Unlock all items in EX Options
Reach a chain of 1000
Lead the laser turret to defeat Medulla
Reach layer 25 in Infinity Drive mode
Reach Layer 15 in Infinity Drive mode
Complete Boss Rush mode
Unlock all items in the Art Gallery
Destroy 15,000 homicidal robots
Defeat one of Embryo's phases before he can relocate
Collect every Battery dropped in the Collider level
Unlock all items in the Codex
Drop a cannonball down the hole in Filament
Finish any level without taking damage
Play as 8 Androids
Activate an EX Option
Destroy every laser fence In Justice's first phase
Unlock any item that costs credits
Destroy an enemy with Helo while it's caught by a Singularity
Earn an S+ rank on any level
Rescue the Genki Star
Destroy seven enemies with a single Rail Gun shot
Destroy 3 enemies by driving another enemy through them with the Giga Drill
Defeat Superstructure Engineer Venom
Defeat Security Administrator Justice
Cause 3 mines to explode in succession without being shot
Defeat Hydroponics Controller Vespula
Reach a chain of 100
Defeat Production Overlord Embryo