Port Royal 1691
Play a pirate in 1691 and turn the Caribbean's richest city into chaos with ten brutal weapons.
Official site portroyal1691.vercel.app, verified Nov 3, 2026. Linked from the official Vibe Jam 2026 games data as the entry URL submitted under the X handle yajmch. No developer-owned page links the game: the game page has no credits, and that X profile does not link it.
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 Port Royal 1691
A single-player open-world destruction game in the browser, set in Port Royal, Jamaica, in 1691. As a pirate armed with ten weapons you wreck buildings, fight townspeople and turn the richest city in the Caribbean into chaos, as the official submission puts it. The game's script names the weapons: cutlass, boarding axe, flintlock pistol, musketoon, grenado, firepot, petard, powder barrel, rope noose and cannon; the on-screen controls also let you board a ship, mount a horse and fire a cannon, and the town includes Fort Charles, Fort James, Fort Rupert and St. Paul's Church. There is a short tutorial, achievements and a full map. The entrant gives a visit to the Caribbean as the inspiration. 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 Codex as the tool. It finished 76th of 945 entries. Free, on desktop with mouse and keyboard; the submission marks it as not mobile-ready.
How it was built
Partially verifiedIn the official Vibe Jam 2026 submission the entrant lists Codex as the tool and answers Yes to the AI-written field. No devlog describes how Codex was used or which model ran it, and the submission covers the jam version only.
- 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 Codex named as the tool. The game is served as plain ES modules, with separate modules for the island, procedural house generation, NPCs, physics, materials and rendering.
- Engine / framework
- Three.js
- Languages
- Not disclosed
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“Visiting the Caribbean”Verification notes: Tool (Codex), engine, genre, pitch, inspiration and the multiplayer (No), mobile (No) and portal flags from the entrant's answers in the official Vibe Jam 2026 games data (submitted 29 Apr 2026, 17:04 UTC; final rank 76 of 945 entries, no award); rule 3 on the jam page requires at least 90% AI-written code. Developer: the game page names no one. The jam data gives the X handle yajmch, whose profile (display name Yannick Muller, location Palo Alto, CA; bio “AI Engineer | Ironman”) does not link the game, so the name rests on the handle alone. Team size is not stated. The weapon list, landmarks and controls come from the game's page and script. The game's modules talk only to the game's own analytics and error-report endpoints and the jam widget and portal; no calls to AI services were found. The jam page's widget counters showed 817 plays and 4,189 portal transfers for portroyal1691.vercel.app on 4 Nov 2026 (observed; sessions, not players or downloads, so not recorded as metrics). The release date is not stated; the jam submission is dated 29 Apr 2026.
Development history
Entered in the Cursor Vibe Jam 2026 (submission date in the official games data); the jam required at least 90% AI-written code. Final rank 76 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.
Prototype: your vote is kept only in this browser and is not counted anywhere.
Not currently ranked.
No player reviews yet.
Prototype: reviews are stored in your browser only and are not published or sent to a server. Reviews are shown in the language they were written in.
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 |
| Port Royal 1691 (game page and scripts) portroyal1691.vercel.app | Official site | Not confirmed | Nov 3, 2026 |
| Yannick Muller (@yajmch) — X profile X | Social post | Not confirmed | Nov 3, 2026 |
| Official game page (language check) portroyal1691.vercel.app | Official site | Not confirmed | Nov 3, 2026 |
