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