Isotope - Chain Reactor
Cascade. Capture. Win.
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Place one orb. Watch the whole board light up. Strategic chain reactions, 7 AI opponents, and an endless mode that punishes hesitation. Free.
Drop an orb, watch the board explode. Isotope is a snappy, free-to-play take on the classic chain-reaction strategy game — turn-based, beautifully drawn, and built to be played in two-minute bursts on the bus or two-hour sessions on the couch.
The rules are simple. The strategy is not.
Tap any empty cell, or stack on a cell you already own, to drop one orb. When a cell hits its critical mass — 2 for corners, 3 for edges, 4 for the middle — it FISSIONS. The orbs scatter to every neighbour, instantly capturing whatever was there. Daisy-chain enough explosions and the entire board can flip in a single turn.
Last colour standing wins.
— GAME MODES —
DUEL — One-on-one against seven distinct AI opponents, each with a different playstyle. Start gentle with Sparky on a 4×4 board, work your way up to Nova on the 7×9 grid. Beat each AI with 1, 2, AND 3 cycling colours to fully master it.
WEEKLY CHALLENGE — A handcrafted puzzle every week. Solve it in the exact number of moves to claim the coin reward — Beginner (50 coins) up to Master tier (250 coins).
ENDLESS — Random board, random difficulty, every wave. How far can you push the cascade before the AI corners you?
TRAINER — Both sides played by you, on any board size up to the 9×7 giant. No score, no AI — just pure positional study.
— FEATURES —
• Six visually distinct elements — Uranium, Thorium, Radium, Radon, Polonium, Plutonium — purely cosmetic, mechanically identical
• 1-, 2-, or 3-colour cycling play at higher difficulties for an extra strategic layer
• Boosters: Hint (50 coins), Undo (75 coins), Skip an AI turn (100 coins)
• Daily login bonus + weekly challenge rewards + watch-to-earn coins
• Looping ambient soundtrack and a satisfying blast SFX for every cascade
• Haptic feedback that scales with cascade depth
• Music, Sound FX, Haptics, and Volume all controllable in Settings
— PRIVACY-FIRST —
• 100% playable offline
• No account required — no sign-up, no login, no email
• Save data is stored on your device only
• Personalised ads only with your explicit App Tracking Transparency consent
— FREE-TO-PLAY DETAILS —
Isotope is free to download and play. Optional rewarded ads grant in-game coins; an optional one-time "Remove Ads" purchase disables them entirely. Coins are an in-game currency only — they have no real-world value and can't be exchanged for cash.
Built by Genesis Solutions.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Improved error feedback when ads can't load
- Bug fixes and polish
The developer, Anton Babayan, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Anton Babayan
- Size
- 13.3 MB
- Category
- Strategy
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Remove Ads $1.99
- Copyright
- © 2026 Genesis Solutions