BUILD THE CHAIN. REACH CRITICAL MASS.

Tatomic is a high-energy falling-block puzzle game about building colorful atomic chains—and choosing the perfect moment to make them react.

Drop linked pairs into the containment field, rotate them into position, and connect atoms of the same element. Every element has its own critical mass. Reach it and the reaction travels through the chain one atom at a time, breaking supports, dropping everything above, and turning careful setups into spectacular cascades.

Build several chains together and trigger them in a single move for huge combo bonuses. The rules are easy to read. Surviving the pressure—and engineering the perfect reaction—is not.

THREE WAYS TO PLAY

Critical Mass

Climb through 30 escalating levels. Changing reaction thresholds and drop speeds force new strategies, while every level transforms the reactor with a distinct animated background and atom style.

Radioactive Survival

Radioactive atoms only detonate when they join a matching-color chain. Use them to prepare the board, choose when to trigger a reaction, and chase a high score as the pace accelerates.

Puzzle Mode

Reconstruct 20 authored molecular silhouettes using one exact connected chain. Shape, orientation, and atom count all matter—and radioactive hazards can destroy a nearly finished solution.

A REACTOR THAT RESPONDS TO EVERY MOVE

• Chain-by-chain reaction propagation, unsupported-atom gravity, cascades, and simultaneous-chain combos

• Thirty animated reactor environments with level-specific atom treatments

• Element-specific explosions, particles, shockwaves, screen shake, and procedural sound effects

• The restored original Tatomic soundtrack

• A visible three-pair queue and ghost landing preview for deliberate play

• Persistent high scores, records, run statistics, grades, and puzzle completion

• First-run field training plus a replayable How to Play guide

• Complete keyboard and controller navigation with controller-specific button glyphs

• Steam Deck layout support, haptic feedback, and event-scaled controller rumble

• Accessibility options for UI scale, audio channels, screen shake, motion, flashes, and color palettes

Tatomic revives the rules and three original modes of the classic game with a completely rebuilt native presentation made for modern PCs and handheld play.