Here is the full list of all 67 Ultratron achievements.
Held one or more pets for 20 levels without dropping
EMP shocked 50 enemies in one blast
Vanquished 10000 enemies
Detonated 25 smartbombs in a single game
Collected 50 fruits
Vanquished 5000 enemies
Held one or more pets for 10 levels without dropping
Player has fired 100000 shots in a game
Detonated 10 bombfruits
Drone survived 30 levels
Drone survived 20 levels
Double three way bouncy max power rapid fire gun
Single drone shot down 100 enemy bullets
Maxed turbo power and recharge
Quantum-shifted through a boss
Rocket pet levelled up to maximum
Killed 1000 enemies with grenades
Double three way bouncy bezerk gun
Awesome double three way bouncy gun
Laser pet levelled up to maximum
Killed 500 enemies with grenades
Full complement of smartbombs
Upgraded all pets to maximum parameters
Upgraded rocket pet to maximum
Smartbombed 50 enemies with one blast
Shooty pet levelled up to maximum
Held one or more pets for 5 levels without dropping
Upgraded laser pet to maximum
Upgraded shooty pet to maximum
Beat a level without firing a single shot
30 kills with a single grenade
EMP shocked 25 enemies in one blast
Grenade add-on upgrades maxed
Defeated two bosses
20 kills with a single grenade
Killed 100 enemies with grenades
10 kills with a single grenade
Defeated Letum
EMP shocked 10 enemies in one blast
Maximum shields
Maximum droid power
Defeated Lues
Player has fired 10000 shots in a game
Collected 25 fruits
Vanquished 2500 enemies
Single drone vanquished 250 enemies
Drone survived 10 levels
Smartbombed 25 enemies with one blast
Defeated Bellum
Got 100% on a dodge stage
Survived assault level without taking damage
Maximum dot slurp range
Maximum drone upgrades
Maximum score multiplier
Smartbombed 10 enemies with one blast
Got 100% on a challenge stage
Collected 1000 dots
Consumed 10 consecutive fruits
Collected 10 fruits
Vanquished 1000 enemies
Defeated Ieiunitas
Collected 500 dots
Vanquished 500 enemies
Player has fired 1000 shots in a game
Collected 250 dots
Collected 100 dots
Vanquished 100 enemies