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