Solo developers are shipping complete games with AI tools
March 2026 might be the month that "vibe coding" crossed from novelty to production. Multiple solo developers and two-person teams shipped complete, playable games built primarily with AI tools. Not prototypes. Not demos. Actual finished products, some of them on Steam.
Void Balls: 29,000 lines in 10 days
BigDevSoon shipped "Void Balls," a bullet-hell platformer, in just 10 days. The stats are wild: 29,000 lines of C#, 173 scripts, 88 test files, 5 enemy types, and 15 power-ups. Their workflow used 8 parallel Claude Code agents, each handling a different domain of the game (physics, enemies, UI, audio, and so on).
Art came from Replicate models. They used Flux 2D Game Assets for sprites and Recraft V4 Pro for UI elements. Audio was generated through ElevenLabs. The whole thing was orchestrated by a single developer directing AI agents like a project manager running a team.
Building full games with Claude Code vs GPT-5 Codex
Grumbulus: two evenings, two developers
Two developers built "Grumbulus," a browser game where you play as a storm cloud destroying a city, in two evenings. The game runs on 15,000 lines of vanilla JavaScript with procedural audio and parallax rendering. All code was generated through Claude Code. No frameworks, no game engine. Just raw JS and a couple of people with a funny idea.
Weekend roguelike
Barret Blake built a web-based roguelike dungeon crawler over a single weekend using Claude Code. The game features procedural dungeon generation, turn-based combat, inventory management, and multiple enemy types. Blake documented the process on his blog, showing how he went from concept to playable game in roughly 48 hours.
Catvivors hits Steam
Przemek Chojecki, an AI researcher, released "Catvivors" on Steam Early Access on March 13. It's a roguelite auto-battler where you play as a cat fighting waves of enemies, built with Claude Code and Codex. The game has 6 playable characters, 15+ weapons with evolutions, and 24 hand-crafted levels. It's priced at $4.99 and runs on Windows, Mac, and Linux.
CODEX MORTIS: "100% AI-developed"
The boldest claim came from CODEX MORTIS, which launched on Steam Early Access on March 26 billing itself as the "world's first 100% AI-developed game." Developer GROLAF says every line of code, every sprite, and all music was created through AI tools.
The game itself is a necromantic survival bullet hell. A free demo in December 2025 attracted 10,500 players who averaged 71-minute sessions, over four times the industry average for indie demos. It landed on Steam's Popular Upcoming list before launch. Twitch streamer Asmongold played it and called it "pretty good."
Testing AI-powered game development with Cursor and Claude
What this means
The common thread across all these projects isn't that AI replaced the developer. It's that AI compressed the timeline. Tasks that used to take weeks now take days. A solo developer can now run multiple AI agents in parallel, effectively acting as a creative director rather than writing every line by hand.
The first 80% comes together fast. The last 20%, the polish and game feel, still needs human judgment. But the barrier to shipping a complete game has dropped dramatically.