Product DesignGame DesignReal-Time

Slideparty: PowerPoint Party Game Platform

The multiplayer PowerPoint party game. Create funny slides, present them, and rate each other!

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TLDR;

With over 450 users, Slideparty is a multiplayer web party game where friends pick a topic, build slides under time pressure, present them live with voice chat, and vote for the best one.

With a mobile ready simplified slide creator, voice chat, GIF/stickers and zero install required, it turns any group hangout into an instant presentation showdown.

The first version launched at the end of 2024 did not feature any PowerPoint building ability. A new update is coming adding this and much more.

The issue

Impromptu presentation games are a staple of parties and team-buildings, but the current options are painful:

  1. Screen-sharing a Google Slides: clunky, no real-time sync, no voting, no fun
  2. PowerPoint Karaoke apps: most are abandoned side projects with terrible UX, no mobile support, and no voice chat
  3. Jackbox-style games: great but expensive, no slide creation, and you can't pick your own topics

There's no modern, free, browser-based game that lets a group of people create slides on a topic, present them live with voice, and vote on the results: all from their phones or laptops with zero setup.

Slideparty fills that gap.

Process

The project started as a way to explore real-time multiplayer architecture with Convex. The core loop (create → build → present → vote) was prototyped quickly, then refined over several iterations.

Key parts of the latest update to come:

  1. Real-time party state machine: designing the lobby → creating → presenting → finished lifecycle with organizer controls (pause, resume, reset timers, kick players)
  2. Slide editor on web: assembling a full slide builder with layout templates, image search (Unsplash), GIF/meme search (Klipy), sticker placement, custom fonts and colors
  3. Live presentation sync: making sure every player sees the exact same slide in real-time as the presenter navigates, powered by Convex reactive queries
  4. P2P Voice Chat: implementing WebRTC full-mesh voice chat with Convex as the signaling server, including mute/unmute and host force-mute
  5. Voting and scoring system: three-axis voting (Original, Well Presented, Hilarious) with weighted scoring and a podium/leaderboard at the end
  6. Party join flow: 6-character codes, QR codes, share links, with rate limiting to prevent abuse
  7. Mobile-first responsive design: every screen works on phone, tablet, and desktop

The stack

Slideparty is built on a modern real-time web stack:

  • Next.js 16: React 19 framework with App Router for routing and API routes
  • Convex: Real-time backend: database, queries, mutations, and reactive subscriptions that power the entire multiplayer experience
  • Clerk: Authentication provider for sign-in/sign-up
  • Neobrutalism UI + TailwindCSS: Design system with accessible primitives
  • WebRTC: Peer-to-peer voice chat (full mesh topology, STUN via Google)
  • Unsplash API: High-quality image search for slides
  • Klipy API: GIF, meme, and sticker search
  • Vercel Blob: Object storage for user-uploaded images
  • Vercel: Hosting and deployment platform
  • PostHog: Analytics and session replays

Communication and Marketing

The target audience is friend groups, coworkers, and party organizers looking for quick group activities. Discovery happens through:

  • Reddit Post answering from newcomers to the trend (using f5bot to receive alerts on post containing certain keywords)
  • Word of mouth during game sessions: every player becomes a potential organizer
  • Social sharing via the built-in share card at the end of each game (podium screenshot)
  • Communities around party games, team-building activities, and icebreaker tools

The zero-friction join flow and mobile slide creation removes the biggest barrier to adoption in group settings.

Deliverables

  • The Platform: fully functional multiplayer party game with real-time sync, voice chat, and voting
  • Slide Editor: rich creation tool with layouts, images, GIFs, stickers, fonts, and colors
  • Voice Chat: P2P WebRTC implementation with host moderation controls
  • Mobile-responsive design: works seamlessly across all devices
  • Party management: invite system with codes, QR, and share links
  • Scoring and results: three-axis voting, weighted leaderboard, podium, and shareable results