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