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