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