Chain Reaction - Play Free Online

Play Chain Reaction free online — Trigger massive cascading chain reactions by clicking at the perfect spot in this satisfying puzzle game. Instant play at...

Editor's Notes

Place a single trigger blast in exactly the right spot and watch it set off a cascade across a field of stationary bombs

What players will love

Aim for the densest cluster of bombs you can find, since the bombs never move and position is everything
Click near the center of a group rather than its edge so the trigger ring touches as many bombs as possible
A bomb's drawn size doesn't tell you its blast radius; they're rolled separately, so judge by how tightly packed the field is instead
From level five you get a second trigger click and from level ten a third, so set off separate clusters instead of forcing one
Watch the live chain counter to gauge how far a cascade is reaching before you spend your next click

Written by Sam Chen, Game Curation Lead · 2025-03-01

About Chain Reaction

Place a single trigger blast in exactly the right spot and watch it set off a cascade across a field of stationary bombs. Every level scatters 10 + 5 per level bombs at rest, each with its own random visual size (15 to 25 px) and its own random blast radius (40 to 70 px), and they never move, so success is entirely about position rather than timing. Your trigger click drops a white blast that expands to 60 px; any bomb its ring touches explodes, and that bomb's ring catches the next, rippling outward as far as the layout allows. The goal is to detonate at least a percentage of the bombs, min(40 + 3 per level, 90) percent, or the round ends with 'NOT ENOUGH!' You don't always get just one click: you get 1 + level/5 trigger clicks, so from level five you have two and from level ten three. Scoring stacks 10 points per exploded bomb plus 5 per link in the chain, and a live counter tallies the explosions as they cascade. Levels climb endlessly and your best score is saved locally.

Chain Reaction — Quick Facts

Genre: Puzzle, Casual, Arcade
Tags: reaction, casual, single-player, physics
Platform: Web browser · PC · Mac · Chromebook · iPhone · iPad · Android
Input: Mouse, touchscreen
Game mode: Single-player
Added to FastPlayGames: 2026-03-12
Developer: FastPlayGames
Price: Free · no downloads · no sign-up
Offline play: Yes, after your first visit while online
Data collection: None — game runs in a sandboxed iframe

How to Play Chain Reaction

Scan the screen for a spot where the stationary bombs are packed closest together, then click to drop a trigger blast there. Any bomb the blast touches explodes, and each explosion's ring can catch nearby bombs, chaining outward. Detonate at least the target percentage shown in the HUD (min(40 + 3 per level, 90) percent) to advance, or the round ends with NOT ENOUGH. You get 1 plus level/5 trigger clicks, so spend extra clicks on the next-densest clusters. Score 10 per exploded bomb and 5 per chain link, so longer cascades pay more.

Controls

Click or tap anywhere to drop a trigger blast at that spot. The bombs are stationary, so position is the only thing that matters; pick the densest cluster you can find. You get more than one trigger click on higher levels (1 plus level/5). On mobile, just tap the screen.

Tips & Strategies

Aim for the densest cluster of bombs you can find, since the bombs never move and position is everything.
Click near the center of a group rather than its edge so the trigger ring touches as many bombs as possible.
A bomb's drawn size doesn't tell you its blast radius; they're rolled separately, so judge by how tightly packed the field is instead.
From level five you get a second trigger click and from level ten a third, so set off separate clusters instead of forcing one.
Watch the live chain counter to gauge how far a cascade is reaching before you spend your next click.

Frequently Asked Questions

How does the chain reaction work?

When you click, an explosion appears at that spot. Any particle caught in the explosion also explodes, which can catch more particles, creating a chain. The reaction continues until no more particles are within blast range.

How many trigger clicks do I get per level?

1 plus level/5, so one click on early levels, two from level five, and three from level ten. Each click drops a separate white trigger blast that expands to 60 px.

How do I pass a level?

You need to explode at least the target percentage of bombs, which is min(40 + 3 per level, 90) percent shown in the HUD. Fall short and the round ends with NOT ENOUGH. Score is 10 per exploded bomb plus 5 per chain link.

Chain Reaction is a free puzzle game you can play instantly at FastPlayGames. No download or registration required.

Categories: puzzle Games | casual Games | arcade Games

Tags: #reaction #casual #single-player #physics

Developer: FastPlayGames