Encierro
Free · play online in your browser, no download
A multiplayer bull run: dodge and jump the charging bulls of Pamplona's San Fermín festival and outlast everyone else.
Official site encierro.expat-daily.com, verified Nov 3, 2026. Entry URL in the official Vibe Jam 2026 games data under the X handle @milanm_; the game's start screen shows “made by @milanm_” linking that X account.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop browser. No download.
Browser (no download) · Official link verified Nov 3, 2026.
About Encierro
A free multiplayer survival game for the browser set during the bull runs of the San Fermín festival in Pamplona. You play one of the runners in white shirts and red scarves and try to survive the charge: every second alive scores a point, jumping clean over a charging bull is worth 50, running close to a bull without being hit earns bravery points, and sangria cups score 20 each and give a speed boost but make your runner wobble. Narrow passages can block the bulls, and a downed runner can be revived by a teammate. You can share a room code to run with friends or play alone, with bots filling the crowd; the game is played with keyboard and mouse. The entrant, who writes that they have lived in Spain for three years, wanted a game connected to the country. It was made for the Cursor Vibe Jam 2026, whose rules required at least 90% of each game's code to be written by AI; the official submission lists Claude Code as the tool. It finished 707th of 945 entries.
How it was built
Partially verifiedIn the official Vibe Jam 2026 submission the entrant lists Claude Code as the tool and answers Yes to the AI-written field. No devlog or credit describes how Claude Code was used or who made the 3D models and sounds.
- OfficialJam rule 3: at least 90% of the code has to be written by AI. — Vibe Jam (Pieter Levels)
Built for the Cursor Vibe Jam 2026 on Three.js with Claude Code named as the tool. The entrant writes that moving house took up most of April, leaving little spare time for the game. Multiplayer rooms are joined by room code, and bots fill empty places in the crowd.
- Engine / framework
- Three.js
- Languages
- Not disclosed
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
Verification notes: Tool (Claude Code), engine (ThreeJS), genre (Action, Adventure), pitch, inspiration and the multiplayer (Yes), mobile (No) and portal (Yes) flags from the entrant's answers in the official Vibe Jam 2026 games data (submitted 30 Apr 2026, 21:34 UTC; final rank 707 of 945 entries, no award), re-read on 5 Nov 2026; rule 3 on the jam page requires at least 90% AI-written code. Developer: the game credits “@milanm_”, the handle in the jam entry, and the entrant writes in the first person about living in Spain for the past three years; the X profile could not be read on 5 Nov 2026 (the lookup returned “User not found”), so no real name or location is recorded. The game is hosted on a subdomain of Expat Daily, an English-language news site for expats in Spain and Portugal; the developer's link to that site is not stated. Scoring, controls and room codes come from the game's script and guide; the game was not played. The game's code was checked for calls to AI services and none were found. The release date is not stated; the jam submission is dated 30 Apr 2026.
Development history
Entered in the Cursor Vibe Jam 2026 (submission date in the official games data, 21:34 UTC); the jam required at least 90% AI-written code. Final rank 707 of 945 entries, no award.
Game performance
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Browser (official site)
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| Cursor Vibe Jam 2026 — rules, prizes and game stats Vibe Jam (Pieter Levels) | Official site | Not confirmed | Nov 3, 2026 |
| Vibe Jam 2026 games data (entrant submissions, final rank, awards) Vibe Jam | Official site | Not confirmed | Nov 3, 2026 |
| Encierro - Bull Run — game page and script encierro.expat-daily.com | Official site | Not confirmed | Nov 3, 2026 |
| Official game page (language check) encierro.expat-daily.com | Official site | Not confirmed | Nov 3, 2026 |
