All workCase 01 / 06
Game · Live on Reddit
Reddit Devvit · 2025 to 2026
Stonefall
Game design, 3D development, and live operations, all by Mainichi. From hackathon build to 42,000 daily players.
Stonefall · Live on Reddit
42KDaily at peakHonorable MentionReddit × Kiro
The brief
A precision tower-stacking game built for Reddit's Devvit platform, where every tower you finish becomes a monument in a shared 3D world. Stonefall started as a hackathon build, took an Honorable Mention in the Reddit × Kiro Community Games Challenge, and went on to reach 42,000 daily players at its peak, with 1.3 million views in twelve months.
Built with React Three Fiber, custom shaders, and a Redis-backed leaderboard. It opened the door to Reddit's Foundry program, and it is still live: you can go play it right now.
Built with React Three Fiber, custom shaders, and a Redis-backed leaderboard. It opened the door to Reddit's Foundry program, and it is still live: you can go play it right now.
Spec sheet
- ClientReddit Devvit
- Year2025 to 2026
- StatusLive on Reddit
Services
- 01Game Design
- 023D Development (R3F / WebGL)
- 03Reddit Devvit
- 04Backend & Leaderboards
How it went
01 · The problem
Devvit games run inside a Reddit post. No install, no store page, no tutorial screen. The game has to explain itself in the first few seconds or the scroll wins.
02 · What we built
A precision tower stacker in React Three Fiber with custom shaders and a Redis-backed leaderboard, wrapped around one shared 3D world where every finished tower stays standing for the next player.
03 · What happened
An Honorable Mention in the Reddit × Kiro Community Games Challenge, 42,000 daily players at peak, 1.3 million subreddit views over twelve months, and an opening into Reddit’s Foundry program.
By the numbersReddit Devvit
Daily players at peak42K
Views in 12 months1.3M
Reddit × Kiro Community Games ChallengeHonorable Mention