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