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