# Chain Reaction Online: Atoms — Orb Blast: 2 Player Strategy > Orb Blast: 2 Player Strategy (iPhone/iPad app by Adhip R.) - Source: https://appshunter.io/ios/app/chain-reaction-online-atoms/id6804805254 (this page in markdown: same URL + `.md`) - Developer: [Adhip R](https://appshunter.io/developer/6787505434) - Category: Games, Board, Strategy - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 16.4 · 50 MB - Languages: American English - Released: 2026-09-09 - Data updated: 2026-11-10 ## What is Chain Reaction Online? Chain Reaction Online is a fast, ruthless strategy game about turning your opponent's board into your own. Place an orb in any empty cell or one you already own. Fill a cell past its limit and it explodes into its neighbours — capturing them. One well-placed orb can cascade across the entire grid and flip a losing position in a single turn. Simple to learn. The chain reactions are where it gets interesting. MODES • Stages — an endless ladder of boards across themed worlds, with music and Stage Points • Quick Match — get paired with a real opponent in seconds • Correspondence — up to 3 days a turn, play at your own pace • Private rooms — share a 6-letter code and play a friend anywhere • Pass and play — 2 to 4 players on one device • vs AI — four difficulties, from Easy to a genuinely mean Expert • Campaign — 100 hand-built levels with escalating pressure • Puzzles — 24 positions with a win you can force, if you find it • Daily Challenge — one new objective every day • Mid-Game Takeover — drop into a half-played board and try to turn it around BOARDS THAT CHANGE THE GAME • Six shapes — Classic, Donut, Diamond, Cross, Pillars and Gates • Walls change which cells are corners, so the whole strategy shifts • 5x5, 6x6 and 7x7 grids COMPETE • Elo rating with 19 tiers, from Newcomer to Singularity • Challenge any player directly, or rematch a recent opponent • All-Time, Weekly and Takeover leaderboards • Achievements for chains, streaks and comebacks • Track your best chain, win streak and match history BUILT TO PLAY ANYWHERE • Campaign, AI, puzzles and pass-and-play work fully offline • Results sync automatically when you are back online • Hints when you are stuck — two per game • No account or sign-up needed MAKE IT YOURS • War matches: book a time with a rival and fight a 10-minute war • Fire, Water and Ice worlds: 30 campaign levels with elemental rules • Locker: orb skins, bursts, trails and board themes, earned by playing • Pro, monthly or yearly: no ads, every Locker item and ad-free bonuses, on all your phones. Subscriptions renew automatically; cancel anytime in your Apple ID settings. Every orb you place is a threat. Every cell you fill is a risk. Chain reactions do not care whose turn it started on. Terms of Use: https://chain-reaction-api-production.up.railway.app/terms Privacy Policy: https://chain-reaction-api-production.up.railway.app/privacy ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Pro Monthly | $2.99 | per month | | Pro Yearly | $19.99 | per year | ## Is Chain Reaction Online safe? Not enough ratings yet to assess Chain Reaction Online. ## Is Chain Reaction Online legit? Chain Reaction Online: Atoms has limited verification signals. The AppsHunter Legitimacy Score for Chain Reaction Online is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 4 releases) ### 3.2.0 — 2026-11-06 Stages: an endless ladder of boards across themed worlds, with music and Stage Points. Chain Reaction Pro, monthly or yearly: no ads, every orb, burst, trail and board in the Locker, and every bonus without watching an ad. Bonuses: double your Stage Points, retry a stage with a head start, or double your Elo for the next game against the computer. Play offline: on a slow connection, tap Play offline and keep going. Results sync when you're back. Game invites: hear when a rival is online or someone is waiting in Quick Match (at most once a day, off in Settings). A new result card shows your rating before and after every game. Now on iPad. Plus fixes: settings that stay set, a quiet launch when sound is off, unique leaderboard ranks, and more. ### 3.1.0 — 2026-10-19 A whole new look, and a lot more to play. • Fresh design: new board, new orbs, new app icon • Quick Match finds you an opponent fast, with a computer opponent if nobody's around • Send emoji reactions to your opponent during online games • Ask for a rematch, or challenge someone back, straight from your inbox • See who's online on the leaderboard • Play on more than one phone: add another phone from your Profile • Smoother chain reactions on older phones • Fixes: sounds, the in-game mute button, and pop-ups that sat under the keyboard ### 2.7.0 — 2026-09-12 The biggest update since launch. NEW WAYS TO PLAY • Puzzles — 24 positions with a win you can force, if you find it • Board shapes — Donut, Diamond, Cross, Pillars and Gates. Walls change which cells are corners, so the whole strategy shifts with them • Hints — two per game, showing the move the Expert would play • Offline play — local, vs-AI, campaign and puzzles all work with no connection, and your results sync when you are back A MUCH STRONGER OPPONENT • The Expert AI has been rewritten and now searches ahead properly instead of judging one move at a time • It reacts to how the game is going, and rings the cell it is about to take so you can see the move coming ONLINE • Correspondence games — up to 3 days a turn. Close the app and come back later; Your Games on the home screen keeps your place • Challenge a specific player from the leaderboard, and answer challenges from your inbox • Recent opponents, with your head-to-head record against each • Share a link that opens the app straight into your game • Rematch from the end of a game, win or lose POLISH • The board is clearer to read, and each side's orb count is now on screen as you play • Daily login streak, and achievement unlocks now tell you about it • The Ring/Silent switch is respected FIXED • Report an Issue and Suggest a Feature could stop the app responding • The leaderboard podium mislabelled placements and could move its crown between refreshes • Some screens showed "Rank #" with no number before you had finished a game ### 2.6.1 — 2026-09-09 No release notes. ## Apps similar to Chain Reaction Online | App | Rating | Price | Category | | --- | --- | --- | --- | | [chain reaction by ephileo](https://appshunter.io/ios/app/chain-reaction-by-ephileo/id6806811293) | 5.0 (1) | Free | Games | | [Chain Reaction(Online)](https://appshunter.io/ios/app/chain-reactiononline/id6748000370) | 4.6 (18) | Free | Games | | [Manners!](https://appshunter.io/ios/app/manners/id6762265939) | — | Free | Games | | [Chain Reaction OG](https://appshunter.io/ios/app/chain-reaction-og/id6792323513) | 3.0 (2) | Free | Games | | [Kalooki Kaluki Kalookie](https://appshunter.io/ios/app/kalooki-kaluki-kalookie/id6497948571) | 4.3 (13) | Free | Games | | [snake and ladder online](https://appshunter.io/ios/app/snake-and-ladder-online/id1615322422) | 5.0 (1) | Free | Games | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-10.*