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