Overview

Reddit is hosting a virtual hackathon from August 28th to September 17th, 2025. We’re offering $49,000 in prizes for the best apps built for redditors.

The challenge:

Build a new game, social experiment, or experience on Reddit’s Developer Platform using our Interactive Posts feature. For this hackathon, we're asking developers to use Devvit Web, which allows you to build Devvit apps using web technologies you’re already familiar with (e.g. react, phaser, three.js), genAI tools, or your favorite game engine (Godot, Gamemaker, Unity, etc).

Categories:

1. UGC (user-generated content) Games: anything incredibly Reddit-y, fun, and community-driven that features user-generated content. User content can come in the form of posts, comments, drawings, or images. Examples of existing Devvit games that include UGC are: r/flappygoose, r/pixelary, r/riddonkulous, r/leapcraft, r/Spottit.
2. Daily Games: guessing games, word games, drawing games, scrollers, puzzlers, pets, and more. While content doesn’t have to strictly be daily, it should make smart use of fresh, recurring content. Note that we’re still looking for something that is unique to Reddit and will drive redditor discussion here. Examples of existing Devvit games that include recurring challenges include: r/hotandcold, r/syllacrostic (which we recently acquired!), r/ninigrams.

Games must be built on Devvit Web and be compliant with our Devvit Rules. Read our guide on how to build games for Reddit for more guidance on building for our platform.

For this event we are looking for polish, meaning apps that are ready to Beta or GA. We understand that not all projects will reach this threshold, but projects that are well tested and concept-complete will score higher.

Getting started

1. Get started with the Quickstart
2. Browse our Template Library for building with a familiar framework
3. View examples of existing games on r/GameOnReddit
4. Join us on Discord for live support and office hours: https://discord.com/invite/Cd43ExtEFS 

Inspiration

Our previous hackathon has some excellent examples of games built with the platform.

Sustaining Success

Successful apps built during the hackathon can become eligible for Reddit Developer Funds, which rewards apps for reaching viewership milestones, or apps that are responsible for the creation of a new established community. Learn more about the program here. Eligible developers also have access to our Payments sandbox APIs to build premium layers or goods into their apps. To qualify for Developer Funds or Payments API access, developers need to meet our Earn eligibility requirements.

• Delightful UX
  Experiences should be built with exciting layouts and themes. While apps do not need to be perfect, it should be easy and fun to uncover what the app has to offer.
• Polish
  Your submission should be as close to publishable as possible and compliant with Devvit Rules. Judges should be able to understand everything we need to know by interacting with example posts. The closer to launch quality, the higher the score here.
• Reddit-y
  Reddit is all about community and embracing topics people care about, no matter how weird. We want apps to have their own identity, are community-minded, and bring something fresh to the platform. The best apps will bring a community together.
• [For the UGC Category] Quality User Contributions
  Does your app enable users to create unique custom content? Are user drawings, words, comments, sound, or images a central aspect of your game? The more central UGC is to the post creation or game, the higher this score will be.
• [For the Daily Challenge Category] Recurring Content
  Does your app create recurring content, challenges, and intrigue? While content does not have to strictly be *daily*, it should make smart use of fresh content.