Critical Mass is a push-your-luck arcade game about knowing when to stop.

Fire one neutron into a drifting reactor core and watch the collisions multiply. Every split adds energy to the pot, grows your combo, and pushes the heat closer to 100%. Let the cascade run for a bigger payout or trigger an Emergency Shutdown to bank the energy before the core melts down.

Clear timed shift quotas, read the isotope field, and choose reactor mutations that always come with a cost. The hotter you dare to run the core, the larger your shutdown bonus. One greedy second can end the run.

• Short, score-driven runs
• Endless escalating shifts
• Risk-and-reward mutation drafts
• Daily reactor seed and global leaderboard
• Procedural vector visuals and synthesized audio

Controls: Aim with the mouse, left-click to inject, and press Space or right-click to shut down.