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