Starkcity

Splash
Main menu
Online Game
Online Game with peers
Game
Properties

Inspiration

We wanted to merge the thrill of Monopoly with the transparency of blockchain. The idea of a city where every deal, rent, and property is verifiably onchain inspired StarkCity — a decentralized twist on a classic.

What it does

StarkCity lets players roll dice, buy properties, build houses, and collect rent — all powered by Starknet and Dojo.
It supports online multiplayer (via sockets) and AI mode where you can play against a computer opponent. Every property, house, and hotel is represented as an ERC-1155 token, ensuring verifiable ownership.

How we built it

We built the core game logic using Dojo’s ECS framework, with:

ERC-1155 tokens: Properties 1–40, Houses 1001–1040, Hotels 2001–2040.
Socket.IO server: For real-time multiplayer.
React frontend: For smooth UI and game updates.
AI heuristics: For single-player mode decisions.

Dice rolls follow a fair random distribution:
[ P(x) = \frac{1}{36}, \quad x \in [2, 12] ]

Challenges we ran into

Syncing onchain and offchain states in real-time.
Balancing speed and decentralization.
Designing the ERC-1155 ID system to map properties, houses, and hotels efficiently.
Making the AI play competitively but predictably.

Accomplishments that we’re proud of

Built a fully onchain Monopoly experience using Dojo.
Designed a clean, expandable ERC-1155 asset hierarchy.
Implemented both multiplayer and AI modes in one unified system.

What we learned

How to model complex game systems in Dojo ECS.
How to bridge offchain gameplay with onchain verification.
The importance of UX design when mixing real-time actions with blockchain logic.