
CODEX MORTIS
Action · RPGA survivors-like necromancy deckbuilder whose Steam page says AI wrote all of its code.
Download required
View on SteamVibeGameDB lists 27 games in this group, 10% of the 272 games on the Claude Code page. Each one has a source for how it was made. 19 are free or free to play and 8 are paid; 11 can be played in a browser. The most recently added is Gutterflame (November 2026).
Ordered by editorial score, then player rating, then release date. Open a game for its sources.

A survivors-like necromancy deckbuilder whose Steam page says AI wrote all of its code.
Download required
View on Steam
A choose-your-own-adventure comedy RPG: arrive in Bangkok, lose your wallet and talk your way through the city.
Plays instantly in the browser
Play free — official site
A turn-based dark fantasy RPG in the afterworld, with code written by Claude Code.
No download needed
View demo on Steam
A multiplayer MUD in the style of the 1990s, with room art and sprites over the text log.
Plays instantly in the browser
Play free — official site
A traditional browser roguelike made with Claude Code by a Japanese novelist.
Plays instantly in the browser
Play free — itch.io
A classic 16-bit-style turn-based JRPG turned into a roguelite, with code written by Claude Code.
Download required
View on Steam
A dark-fantasy idle ARPG: the fighting is automatic, the build is yours.
Plays instantly in the browser
Play free — itch.io
A text RPG about a rookie dungeon hunter, built in Twine with Claude Code.
Plays instantly in the browser
Play free — itch.io
A 1992 online text RPG, rebuilt from old scripts by Claude Code.
Plays instantly in the browser
Play free — official site
A Diablo-style dark fantasy ARPG whose solo developer says Claude Code wrote every line, engine included.
Download required
View on Steam
A keyboard-only ASCII colony sim inside a dead god's corpse, coded mainly by Claude Code and Codex.
Download required
View on Steam
A terminal-style roguelike RPG for Windows, made by a non-engineer with Claude Code.
Download required
View on itch.ioA free feudal sci-fi sandbox strategy RPG for the browser: lead a minor noble house across a living campaign map and fight real-time squad battles. The developer says Claude Code writes the code.
Plays instantly in the browser
Play free — itch.io
A step-by-step first-person dungeon crawler where your torch is both your light and your clock.
Plays instantly in the browser
Play free — itch.io
A two-hour retro dungeon crawler in the browser: lead four tired heroes into a tomb while your lantern burns down.
Plays instantly in the browser
Play free — itch.io
A first-person dungeon crawl in which you hold the torch, not the sword: your blind party fights only what you light.
Plays instantly in the browser
Play free — itch.io
A dark-fantasy command RPG in which even “Fight” and “Run” are drops you take from enemies, slot, merge and upgrade, made in six hours with Claude Code.
Plays instantly in the browser
Play free — itch.io
A cute mobile-first adventure in the browser: fight real-time battles, chop and mine, craft gear at the Forge and rebuild a village on the way to a dragon.
Plays instantly in the browser
Play free — official site
A free 3D voxel MMORPG in a browser tab, with six classes, dungeons, a 12-player raid and battlegrounds. The solo developer says Claude Code wrote all of the code.
Plays instantly in the browser
Play free — official site
A moddable voxel survival sandbox with self-governing NPC colonies, RuneScape-style skills and circuitry that reaches real scripting.
Demo available
View demo on itch.io
A dark fantasy survivors-like: hold out against monster waves under a blood-red moon and break five Seal Stones to call down the final boss.
Download required
View on SteamA pixel-art beat-making RPG: produce beats in cities around the world, get reviewed by local critics and earn each city's sound-system rig.
Plays instantly in the browser
Play free — official site
A free pixel-art idle survival game in a French valley overrun by the dead: pick what your survivor does and they keep at it while the game is closed. The developer says Claude Code wrote most of the code.
Plays instantly in the browser
Play free — official site
A turn-based escort RPG: lead a crew through the ruins of an AI apocalypse and keep the scientist alive.
Plays instantly in the browser
Play free — official site
A satirical pixel-art survivor shooter in which caricatured tech founders fight their way to a rogue AI.
Plays instantly in the browser
Play free — official site
A free first-person party dungeon crawler in the style of the 1985 classics, with original content, chunky Amiga-era pixels and a synthesised chiptune score. Built as a demo project to test Claude Fable 5, with the code produced in Claude Code sessions.
Plays instantly in the browser
Play free — official site
A monster-raising browser RPG: befriend and evolve 78 monsters, grow feed on your farm, clear nine dungeons and battle friends' parties by password.
Plays instantly in the browser
Play free — itch.io