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