Here is the full list of all 46 Nitro Kid achievements.
Die on the Rooftop Floor.
Win a battle with 1 HP remaining.
Beat Security Level 10 with K31.
Collect all Character archives.
Unlock Security Level 10 with K31.
Obtain all starter cards and patches for L33, J4X and K31.
Rescue 1000 Kids.
Unlock Security Level 5 with K31.
Beat Security Level 10 with J4X.
Unlock Security Level 10 with J4X.
Unlock Security Level 5 with J4X.
Defeat a boss without taking any damage.
Beat Security Level 10 with L33.
Defeat the Creator.
Rescue 100 Kids.
Unlock Security Level 10 with L33.
Use 4 Infusions in one turn.
Unlock Security Level 5 with L33.
Win 5 runs.
Defeat the Fire Warden.
Finish a turn without playing a card.
Unlock Security with K31.
Defeat the Freon.
Defeat the Feuer.
Defeat the Scientist.
Unlock K31.
Unlock Security with J4X.
Defeat the Commander.
Defeat the Twins.
Rescue 1 Kid.
Unlock J4X.
Unlock Security with L33.
Win a run.
Defeat the Vine Queen.
Clear a room in 1 turn.
Upgrade 4 patches in a single run.
Upgrade 6 cards in a single run.
Defeat the Brains.
Play 20 or more cards in a single turn.
Spend 10 or more Energy in one turn.
Defeat the Founder.
Win a run with more than 50 cards in your deck.
Win a run without using any Infusions.
Obtain all other achievements.
Win a run without gaining any patches other than the ones you start with.
Collect $2000 or more in a single run.