Aftershock Online
A superhero MMO built for one player, where AI-controlled heroes fill your party and your ten-hero raid team.
Links go to the official store or developer page. Last verified Nov 8, 2026.
Where to play
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- View on itch.ioitch.ioReleased · Free browser demo of the first 15 levels; full game US$5$5.00
Plays in the browser on itch.io. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About Aftershock Online
A superhero action RPG in the browser that plays like an MMO for one person. Twelve years after the Lodestar fell on the city of New Meridian and woke the first supers, it wakes you. You pick from 30 base powers, from Pyrokinesis to Gravity Control to Gigantism, and can fuse two of them into one of 23 greater powers or three into one of 15 apex powers; each of the 68 powers has its own attacks, talent tree and ultimate, which the store page counts as 4,719 possible three-power builds. The city has 99 quests and 47 characters across levels 1 to 50: you can lift and throw cars, buses and lampposts, fly, run at super speed, glide or ride bikes and the hero van, with day and night, weather, traffic and emergencies. The endgame has five dungeons, two 10-hero raids, world bosses in the streets, a personal nemesis who remembers you and the Infinite Spire. Party members and raid teams are computer-controlled heroes run by the game itself, so there are no queues. The developer, superpikapoo, says they built it alone with Claude Code and Claude Opus 5.5 over about six weeks and 18 versions, describing what to fix and asking Claude for suggestions; the whole game is one HTML file. The first 15 levels are a free browser demo on itch.io (Chrome or Edge on a computer, keyboard and mouse; not for phones or tablets), and the full game is listed at US$5.
How it was built
Partially verifiedIn a post on r/vibecoding titled “I vibe coded a solo superhero MMO with Claude Opus 5.5” (2 Nov 2026, UTC) the developer says they have been building the game by themselves since Opus 5.5 came out about six weeks earlier, and that it took 18 versions. The original prompt was “something like make a superhero game with 3 different powers to choose from in a metropolis fighting enemies in a wave format”, and the MMO side grew from there. The developer writes: “i used Claude code on max effort with the project section”; they would say what they wanted fixed and then ask what Claude would suggest next, getting “about 5-10 solid suggestions”. Per the post the current version used about 3 billion tokens on a US$100 Max plan plus a US$20 Pro plan (US$120 a month), which the developer estimates would have cost US$2,000 to US$9,000 at Opus 5.5 API prices. The post adds that “Even the trailer was made with Claude.”
- Developeritch.io page: “Made by one developer.” The AI disclosure ticks AI Assisted, Code, Graphics, Sounds and Text. — itch.io
Grown out of a single prompt for a three-power wave-fighting superhero game into an MMO-style RPG over 18 versions, by the developer playing, describing fixes and asking Claude for next steps. The developer says the whole game is one HTML file of about 3.5 MB that runs in the browser; the itch.io demo build read on 8 Nov 2026 is a single HTML file of about 4.2 MB that bundles Three.js (r128). The developer calls balance the hardest part: at one point their level 50 build was doing 400,000 damage per second. The AI heroes in the party and raids are the game's own computer-controlled characters; the demo build loads only fonts and itch.io's own script from outside and contacts no AI service.
- Engine / framework
- Three.js
- Languages
- JavaScript
- Team size
- 1 (solo)Developer ReportedReddit (u/superpikapoo)
- Initial build time
- Not disclosed
- Development time
- 6 weeksDeveloper ReportedReddit (u/superpikapoo)
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“I've been building this by myself since Opus 5.5 came out about 6 weeks ago. It took 18 versions to get here.”Verification notes: AI use, team size, location, development time and cost from the developer's post on r/vibecoding by u/superpikapoo (2 Nov 2026, 01:22 UTC), read from the Arctic Shift Reddit archive on 8 Nov 2026; it links this itch.io page and had no comments in the archive. The post was cross-posted to other subreddits; only this one was used. Story, powers, content, demo split, price and requirements from the itch.io page, read on 8 Nov 2026: published 1 Nov 2026, 19:31 UTC, last updated 4 Nov 2026, 03:43 UTC, status Released, HTML5, genres Role Playing and Action. The purchase box listed a US$5 minimum but said nothing was available for download yet, so how the full game is delivered was not confirmed. No share of AI-written code is stated, so none is recorded; the code claim rests on the title (“I vibe coded … with Claude Opus 5.5”) and “i used Claude code on max effort”. The 6-week figure is the developer's (“since Opus 5.5 came out about 6 weeks ago”). The developer says they are 32 and live in New York; only the city is recorded. The browser demo (single HTML file, 4,187,648 bytes on 8 Nov 2026) was searched for AI service addresses and found to load only Google Fonts and itch.io's own script; the party and raid “AI heroes” are scripted game characters. JavaScript and Three.js r128 are observed in the build, not stated by the developer. The game was not played.
Development history
Published on itch.io (19:31 UTC) with the first 15 levels free in the browser.
Observeditch.ioThe developer shares the game on r/vibecoding, saying it was vibe coded alone with Claude Code and Opus 5.5 over about six weeks and 18 versions.
DeveloperReddit (u/superpikapoo)
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
itch.io
The first 15 levels (the city, the first dungeons and every base power) play free in the browser on itch.io. The full game (levels 1 to 50, all 68 powers, both raids and the endgame) is listed at US$5.00 or more; on 8 Nov 2026 the purchase box said “Nothing is available for download yet.” Progress can be carried over with the demo's Export button. Windows, macOS or Linux in Chrome or Edge, keyboard and mouse; not for phones or tablets.
Not publicly available: itch.io rating, Downloads, Gross revenue.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| I vibe coded a solo superhero MMO with Claude Opus 5.5 (r/vibecoding) Reddit (u/superpikapoo) | Social post | Nov 2, 2026 | Nov 3, 2026 |
| Aftershock Online by aftershockonline itch.io | Store page | Nov 1, 2026 | Nov 3, 2026 |
| Official game page (language check) aftershockonline | Official site | Not confirmed | Nov 3, 2026 |
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