Criticality

Clicking rapidly in Criticality does not speed up a chain reaction, it resets the counter tracking it. That one rule reshapes how the entire game gets played, turning what looks like a simple clicker into something closer to a game of restraint.

Splitting the First Atom in Criticality

The core loop starts small: click anywhere on the field and you release two neutrons, each capable of striking an atom. An atom that absorbs a neutron splits and emits two more neutrons of its own, and if those go on to strike further atoms, the chain keeps extending on its own without any further input from you. Longer chains are worth more points than the same number of atoms split in separate, disconnected clicks, which is the entire reason restraint matters here.

Visually the game keeps this readable even as reactions scale up: the triangles on screen are neutrons, the circles are atoms, and watching a single click ripple outward into a field-wide cascade is most of the appeal early on. Casual players who just want to watch a chain cascade across the field get that payoff from the base loop alone, well before any upgrades enter the picture. Coins earned from splitting atoms fund a set of upgrades that reshape how a reaction develops rather than just making numbers bigger, including:

• Momentum, which stops a chain reaction from resetting when you click again mid-reaction
• Neutron reflectors, which give neutrons a percentage-based chance to bounce instead of vanishing
• Pierce, letting a neutron punch through an atom’s remaining health instead of stopping there
• Homing, which curves neutrons toward nearby atoms at an adjustable turn rate

Higher ranks introduce larger atoms that absorb more neutrons before splitting, and while they’re worth more points individually, they also soak up a chain’s momentum if you’re not built to punch through them yet. Players chasing high scores tend to gravitate toward reflector-heavy builds specifically because a bounced neutron can restart a stalling chain without costing a fresh click.

Once a run stalls out, Criticality offers a prestige system that resets your progress in exchange for permanent skills carried into the next attempt, and it’s this loop, rather than any single high score, that keeps players returning to push a reactor further than the last run allowed.

Why does clicking during a chain reaction in Criticality reset it?

Clicking always fires a fresh pair of neutrons, and by default that action also resets the chain counter tracking your current reaction, even if the reaction itself is still spreading. It catches plenty of new players off guard before they realize the reset is deliberate rather than a bug. Buying the momentum upgrade is the direct counter to this, since it removes the reset penalty entirely.

What do the reflector and homing upgrades actually change in Criticality?

Reflectors give each neutron a percentage-based chance to bounce off an atom instead of being absorbed and disappearing, which is especially useful for keeping a chain alive when atoms are sparse. Homing curves a neutron’s path toward the nearest atom at a turn rate you can upgrade further, which matters most at higher ranks where atoms are spread further apart and a neutron traveling in a straight line is more likely to miss.

Players chasing rank progression in Criticality end up spending most of their coins on reflectors, pierce, and homing specifically to keep chains alive at the ranks where atoms stop being generous, which is what separates a short session from a run that pushes a reactor to its actual limit.