MetaCoaster

The Problem

Behavioral AI is one of the lines that separates a blockchain game from a blockchain product. A scripted NPC has a behavior loop, and the loop becomes visible to any player who spends real time in the world. The mechanic always walks the same path. The cleaner always arrives at the same time. The guard always reacts to the same trigger. After enough hours, the world stops feeling like a place and starts feeling like a stage.

For a theme park simulation that wants to hold player engagement across hundreds of hours of gameplay — and across the kind of unpredictable interactions that make a theme park feel alive — scripted behavior fails. What's needed is an autonomous decision system: NPCs that perceive their environment, evaluate options, and act on those evaluations, so that no two play sessions reproduce the same world state.

That's the engineering problem at the center of MetaCoaster.

What we built

MetaCoaster is an AI-driven theme park simulation built for CBI (Crypto Blockchain Industries, publicly listed on Euronext Growth Paris). The product centers on autonomous NPC behavioral systems — mechanics, guards, cleaners — that operate as decision agents rather than scripted actors.

300+ production assets across the park — The simulation includes more than 300 production-ready 3D assets covering rides, roller coasters, shops, player-interactable surfaces, and the broader environmental systems that make the park feel populated.

75+ rides as a ride sub-component — Within the 300+ asset total, the rides themselves number more than 75 — each with its own asset construction, animation behavior, queue mechanics, and ridership simulation.

Roller coasters, shops, interactions — Beyond rides, the park includes roller coaster systems with track physics, shop surfaces where players interact with park commerce, and a broader interaction layer covering food stalls, gift shops, ride entry points, and other player-facing surfaces.

Dynamic weather — Environmental conditions in the park change dynamically. The weather system isn't cosmetic — it affects NPC behavior (cleaners respond to spilled drinks faster after rain, mechanics adjust ride priorities under wet conditions), ride availability, and ambient detail.

Full park management — The simulation includes the management layer: ride scheduling, staffing decisions, maintenance cycles, visitor flow analysis. The park behaves as an operating system, not a static environment.

The behavioral AI engineering

The central engineering work in MetaCoaster is the autonomous NPC behavioral system. Each NPC class — mechanic, guard, cleaner — operates as a decision agent with three layers:

Perception — The NPC senses its environment. A mechanic perceives ride status across the park. A cleaner perceives mess events. A guard perceives crowd density and disturbance signals.

Evaluation — Given perceived options, the NPC evaluates which to act on. A mechanic with three rides reporting issues evaluates priority based on severity, downstream impact, and proximity. A cleaner with multiple mess events evaluates by location and crowd visibility.

Action — The NPC acts on the evaluated decision — moving to the location, performing the action, returning to a routing state — and the perception layer updates.

The result is a park where no two play sessions produce the same NPC behavior pattern. The mechanic doesn't always walk the same path. The world stays alive across long-form play.

The AI behavioral IP is retained by AlgoCoder per the termination agreement on the engagement.

The in-product NFT marketplace

MetaCoaster carries an embedded NFT marketplace — the same architectural pattern as the Atari Casino Metaverse, but applied to a different content surface. Park-related assets, characters, and items are minted as NFTs and traded inside the marketplace surface.

This is the marketplace whose minted assets surface on OpenSea today: 292,000+ NFTs minted on Polygon, 3,284 unique holders verifiable on the public collection.

OpenSea is not a platform AlgoCoder built. OpenSea is the public ledger surface where the resulting NFTs from the in-product marketplace are verifiable. AlgoCoder built the in-product marketplace inside MetaCoaster (and inside Alphaverse — see the next case study) for CBI. The NFTs minted via that in-product marketplace were distributed via OpenSea, where the volume sits as public proof of the work.

What this case proves

Production-grade behavioral AI inside a blockchain game environment. Not a tech demo. A live simulation with autonomous decision agents operating across 300+ production assets, with an embedded NFT marketplace tied to a verifiable public ledger surface. Built for a Euronext-listed enterprise client across a multi-year engagement.