Full list of all 26 Criticality achievements.
The base game contains 17 achievements, and there is 1 DLC pack containing 9 achievements.
Get 1000 atom chain reaction with 1 Click
Reach rank 2 on Nuclear Propulsion with no special atoms
Do a 12 jump chain lightning strike
Rank up within 20 seconds of a fresh prestige
Remove 238 non-fissile atoms
Bounce a single neutron off the walls 3 times
Rank up after time is over with 0 shots left
Reach rank 4 in Infiltration with only beam atoms
Buy 100 of each rocket lab technology