Multiplayer Hackathon by Party (Peninsula)
Multiplayer Building is here.
Google Docs made documents collaborative. Figma made design collaborative. Now, Party is making building collaborative.
Most hackathons are a room full of people, each one alone with their own agent. This one works the other way around.
At this event, you'll spend a full day building with agent teams: together, in the open. We pack the room with founders, engineers, product leaders, hackers, and designers, split into teams, and everyone steers the agents together. Agent teams do the heavy lifting on objectives (not prompts) while your whole team directs them in the same live session. Every contribution has a name on it.
You'll leave with something you helped build (hosted publicly), some new friends, and a totally refreshed outlook on building great products.
This event is absolutely free. We're putting up $25,000 in token credits as prizes. You'll join the rest of the group on our community Party space where the tokens are free and you can see and steer everything that's cooking.
What you'll do:
We'll add you to the community Party space
Form a team, or join one when you arrive
Build, review, and ship a real project alongside your team and its agents
Demo what you made to the room
Enjoy food, refreshments, and a day with other passionate builders
What to Expect
Schedule is approximate.
9:30 – 10:00 AM | Doors, Breakfast & Team Formation Grab coffee and breakfast, get your laptop set up, find your team.
10:00 – 10:30 AM | Welcome & Walkthrough What we're building toward, how Party works, the tracks, and how judging works.
10:30 AM | Hacking Begins
12:30 PM | Lunch - brought in, keep building or take a break
4:30 PM | Code Freeze
4:45 – 5:45 PM | Demos & Judging Every team demos. Judges score live.
5:45 – 6:00 PM | Awards
Prizes
$25,000 in token credits, awarded across:
Grand Prize / Best Built Together: $10,000
Best Use of Multiple Agents: $5,000
Most Shippable: $5,000
People's Choice: $5,000
Judged by the Party team and our sponsors.
Who Should Attend
AI-pilled engineers curious what building in the open feels like
Product managers and designers who want to be more involved in the build
Founders and early startup teams looking to ship faster with better quality
Project managers and technical leads
Anyone on the Peninsula who'd like to spend a Saturday building with like-minded individuals
You do not need to be an expert with coding agents. You do not need to arrive with a team - we'll help you find one. You do need to be up for building something with people you've just met.
What You'll Walk Away With
Something real that you helped build - that you'll have access to after the event
The experience of building alongside others, with agents, to create something spectacular
A shot at $25,000 in token credits
Three months of Party Starter, free - which includes $20 in credits, monthly
$250 in credits so you can keep building
Important Details
Format: In person, full day
What to bring: Your laptop. Breakfast, lunch, and snacks are on us.
Experience level: All levels. Party, Cursor, Claude Code, etc. experience not required.
Teams: Teams of 2-5. Come with one or form one at the event.
Capacity: Limited to 100. RSVP required
Location: Downtown Redwood City, Peninsula
Event Info
🎟 Registration: RSVP required - capacity is capped at 100
🍽 Food & Drinks: Breakfast, lunch, snacks, and drinks provided
🏢 Venue: 810 Hamilton - our event space in downtown Redwood City
📍 Address: 810 Hamilton St, Redwood City, CA 94063
🚗 Parking: Street parking on the surrounding blocks & parking structure on Jefferson St.
🚉 Transit: One block from the Redwood City Caltrain station. Approximately 25 min Caltrain ride from 4th & King.
About Party
Party is the multiplayer workspace where your whole team builds together alongside fleets of agents, out in the open. Agent Flows do the heavy lifting while humans steer. You pick the harness and model for each agent in the Flow — Claude Code, Codex, Cursor, Opencode — and work in the same secure session as the rest of your team. Bring your own keys, or use ours.
Learn more about Party at party.build. Try Party at app.party.build (web, MacOS, iOS, and Android).
About 810 Hamilton
810 Hamilton is our event space in downtown Redwood City - a converted loft in the heart of Redwood City. It's where we host Build Nights, and it's available for other events too. 810hamilton.com
Sponsorship & Partners
Interested in getting involved? We work with partners on demos, speaking slots, prize tracks, and co-hosted events. Reach out to Julian at julian@party.build