Use phones as controllers for a big-screen game
Intermediate14h2–3
Socket.IOPhaserQR codes
19/20#multiplayer hackathon ideas
12 ideas across 2 categories · 5 beginner · 6 intermediate · 1 advanced. Sorted by judging fit (editorial estimate).
Ideas tagged multiplayer
One player in a werewolf-style game is secretly an AI
Intermediate16h2–3LLMSocket.IONext.js18/20Productivity
Collaborative Whiteboard with AI Clustering
Brainstorm on a shared canvas and let AI group sticky notes into themes
Advanced26h2–4tldrawYjsEmbeddings17/20Gaming
Campus GeoGuessr
Guess where on campus a photo was taken
Beginner10h1–3LeafletNext.js17/20Gaming
Co-op Online Escape Room
Solve puzzles together where each player sees different clues
Intermediate18h2–3ColyseusPhaserNode.js17/20Gaming
LLM Murder Mystery Party
Every guest gets a secret character while an AI narrator runs the mystery
Intermediate16h1–3LLMSocket.IONext.js17/20Gaming
Language Word Battle
Real-time vocabulary duels with friends
Beginner10h2–3Socket.IONext.jsFSRS17/20Everyone places one pixel at a time on a shared canvas
Beginner10h1–2Socket.IOCanvas17/20Describe movies with emojis while an AI judges guesses
Beginner8h2–4LLMSocket.IONext.js17/20Gaming
AI Dungeon Master
Runs a story-driven game session that remembers player choices
Intermediate24h1–3Next.jsLLMRealtime DB15/20Practise typing real code snippets against friends
Intermediate24h1–3Node.jsSocket.IOReact15/20Gaming
Party Quiz Battle
Instant quiz game on any topic, played on phones
Beginner12h1–2Next.jsLLMRealtime DB15/20