Chain Reaction is a free online explosive puzzle game where one click triggers a cascading chain of explosions. Floating orbs drift across the screen, and your single click creates an explosion that spreads from orb to orb. With 15 progressively harder levels, starting from 5 orbs and scaling up to 75, the game tests your timing and spatial awareness as you try to catch enough orbs to advance.
Each level fills the screen with glowing orbs that float and bounce around. You get exactly one click to place an explosion. When an orb touches any active explosion, it detonates too, expanding outward and potentially triggering more orbs. The chain continues until all explosions fade. Each level has a minimum catch requirement — miss it and you can retry or end the game. Successfully clearing all 15 levels earns you the "God of Destruction" rating.
You get one click per level to start an explosion. Orbs that touch the explosion also explode, creating a chain reaction. Wait for orbs to cluster together, then click in the middle of the group to maximize your chain. You need to catch a minimum number of orbs per level to advance.
There are 15 levels. Level 1 has 5 orbs and requires catching just 1. By level 15, there are 75 orbs on screen and you need to catch 60 of them to complete the game.
Patience is key. Watch the orbs move and wait for a moment when many of them cluster together. Click in the center of the densest group. On higher levels, the orbs are more numerous, which actually helps create longer chains if you time your click well.
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Last updated: March 2026 · whatifs.fun — Free interactive games, experiments & simulations