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