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Hackathons

16 hackathons

People

8,797 people

Projects

1,405 projects

HackathonMicro Hack
J

J-Prody

AI JRec Prody Project

AI Agent prodies

Little WinsProductOpsKafka Connect
HD
HackathonSpacetimeDB
P

Pentacles

AR multiplayer card battle where the stars decide your fate.

Pentacles is a location‑based AR multiplayer game that blends real‑time astrology with strategic card combat. Players input their birth data to generate a natal chart, receive a planetary faction, and mint a unique Tarot‑style deck, while a Bun/TypeScript ephemeris feeder streams live planetary positions to drive weather, zone effects, and combat bonuses. All game state—including player profiles, decks, trades, duels, and zone control—is synchronized through SpacetimeDB using Rust reducers, and an Oracle service leverages Anthropic Claude to answer player questions directly in‑game. The Unity client delivers an immersive AR experience with onboarding, long‑press tooltips, trade panels, and live duel interfaces, ensuring seamless, shared‑state gameplay across devices.

Main Challengebungitjavascript
GC
HackathonSpacetimeDB
RD

Risk: Dominion

Real‑time, four‑dimensional strategy on a living hex map powered by AI

Risk: Dominion is a multiplayer, real‑time strategy game built on SpacetimeDB, where every piece of game state lives in live tables and updates instantly to all players. The Rust backend defines deterministic reducers and scheduled procedures that drive game mechanics, action‑point regeneration, and AI opponents—each AI council consists of four specialist Claude agents plus a commander. The React/TypeScript client, styled with Tailwind CSS and powered by Vite, offers drag‑and‑drop action cards, a hex‑map UI with four dimensional layers, natural‑language query support, live event ticker, global chat with deception mechanics, trust‑score tracking, spectator mode, and full replay capabilities. A Bash‑based setup script automates environment provisioning, ensuring developers can get up and running with a single command.

Main Challengeautoprefixerbashcargo
DSLRLNP
HackathonSpacetimeDB
R

Ripple

Don't build music alone

A collaborative DAW that lets people build music together live.

Main Challengejavascript
KG
HackathonSpacetimeDB
F

FLOCKD

Real‑time multiplayer bird‑flight arena with AI‑driven predator and live commentary

FLOCKD is a progressive‑web‑app 3D bird‑flight game built with Vite, Three.js, and WebGPU (with WebGL fallback). All game state, physics, and matchmaking run inside SpacetimeDB, eliminating a separate server, while a Node sidecar calls Anthropic Claude to act as a predator, generate sabotage events, and provide live commentary that streams to both players and the "The Hunt" dashboard. Players steer their birds via webcam pose detection, keyboard, or device tilt, and can compete in Ring Rush, Nest Quest, Creative, or Survival modes, each featuring polished visual effects, post‑processing, and rich HUDs. The system is deployed on Vercel and demonstrates a fully database‑driven, AI‑augmented multiplayer experience.

Main Challengecsscss3dotenv
MMDJ
HackathonSpacetimeDB
W

Watchman

Search for events across distributed security camera feeds

Watchman captures security camera streams from multiple users, stores each frame in SpacetimeDB, and processes them with Gemini embeddings for fast semantic search. Users can pose natural‑language questions; the system retrieves the most relevant frames, sends them to Gemini 3.5‑Flash, and returns AI‑generated answers with citations. All state—live video feeds, camera status, and Q&A results—is synchronized instantly across clients via WebSocket subscriptions, delivering a shared, interactive experience. The stack leverages React, Vite, Node.js, and TypeScript‑defined reducers for a seamless, real‑time RAG platform. For demo purposes, the deployed site works with webcams.

Main Challengecssnode.jsvite
?
HackathonSpacetimeDB
QA

QuizRush Arena

A live audience activation game for DevRel demos, hackathons, bootcamps, and learning rooms.

DevRel teams, hackathon hosts, bootcamp instructors, and live workshop organizers use QuizRush to turn a passive room into a measurable 25-second quiz race. Users scan one QR, create a profile, type or speak any topic in natural language, answer a private quiz sprint, and see the room move through a public live bracket. Every result is stored as database state and every participant gets a durable score-card link.

Side Challenge Scrabblemarkdowntypescript-node
R
HackathonSpacetimeDB
C

CoNote

One class, one collaborative notebook

CoNote is a collaborative, AI-assisted note-taking app that turns a lecture into a shared, living notebook. Instead of everyone capturing the same class individually, CoNote lets a whole study group contribute together — photos of the whiteboard, Apple Pencil handwriting, typed summaries, and PDF imports — all syncing in real time across every member's device. Each session has its own AI study assistant, powered by Claude, that answers questions grounded exclusively in that session's notes. Ask it to summarize the lecture, clarify a concept, or explain a diagram — it only knows what your class actually captured. Built solo on SpacetimeDB, the entire backend is a single Rust module: schema, business logic, and real-time sync fused into one. No separate server, no auth service, no socket management — just table subscriptions that push every note, stroke, reaction, and presence update to all connected clients the moment it happens. Also a student

Main Challengeswiftrealtime-database
DK
HackathonSpacetimeDB
[-

[Student] - Fineprint

Read the Fineprint before the city does

Fineprint helps NYC building owners understand and reduce compliance risk across major building laws. A user enters one address, and the platform connects that building to public records, emissions data, law-specific deadlines, and estimated fine exposure. It combines a Next.js dashboard, address intake, law filters, fine basis logic, stored building/task records, and compliance calculations for laws like LL97, LL84, LL87, FISP, LL88, LL152, and LL55. It turns confusing local laws into a clear action plan on what exactly applies, what it could cost each year, and what to fix first.

Main Challenge2facode-formattingcode-linting
AMAAFUN+1
HackathonSpacetimeDB
SD

Sandwich Delivery STUDENT

Real‑time co-op sandwich adventure powered by SpacetimeDB

Food Eater is a Godot‑based real‑time multiplayer game built with C# that lets players cooperatively work together and deliver a sandwich through a chaotic city route. It leverages SpacetimeDB for an authoritative backend, synchronizing Player, Sandwich, and Topping tables via live subscriptions and transactional reducers. The client interpolates state changes, handles camera‑oriented input, and visualizes game events through a CanvasLayer, while the server runs a deterministic simulation at 20 Hz to manage physics, topping interactions, and run resets. Export currently only provides for Windows (and possibly macOS, macOS untested). Follow the itch.io site, download your respective platform, extract, and run the .exe.

Main Challengegit
DB?