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