Best AI agent for making games
Which agents people actually use for making games, counted from 29 real use cases, with the top examples for each.
Going by documented use cases, not a lab test: of the 29 games use cases on agentsetups, Claude appears in 21, Codex appears in 6, Manus appears in 1.
Most-discussed: Decompile a full game with a long-running agent swarm by momo5502 (Claude, Codex).
Quick start (from Decompile a full game with a long-running agent swarm by momo5502):
- Start with 3 worker agents decompiling and committing, plus 1 reviewer that coordinates and flags bugs; communicate via Discord.
- Trigger compaction earlier (they cut the threshold from 90% to 42% context fill) to save tokens.
- Stop the reviewer trusting workers’ comments: verify deviations against the original independently.
+1 more step in the copyable prompt.
Counts reflect what people post about, not quality or market share.
Last updated · based on 336 use cases on agentsetups, each credited to its author.
Agents by use cases
Claude for games 21
- Decompile a full game with a long-running agent swarm
Over 3 months and 500B tokens, worker + reviewer agents reached 99% of functions, 83% byte-exact.
Claude, Codex · Games · by momo5502 (blog, 9 Oct 2026) · source
- Make your game legible to AI agents
Kyle Kukshtel’s talk: engineer the game itself as a harness so agentic iteration on gameplay is faster.
Claude · Games · by Kyle Kukshtel (blog, 10 Oct 2026) · source
- Make a 3D shooter for 20-year-old phones in one prompt
Opus 5.5 wrote an integer-math Java engine, its own sprite renderer, 4 maps, 8 MIDI tracks and TTS voice lines.
Claude · Games · by /u/wollymonjac (Reddit, 8 Oct 2026) · source
Codex for games 6
- Decompile a full game with a long-running agent swarm
Over 3 months and 500B tokens, worker + reviewer agents reached 99% of functions, 83% byte-exact.
Claude, Codex · Games · by momo5502 (blog, 9 Oct 2026) · source
- Build a hand-controlled game projected on your wall
Vibe-coded with Codex: a game projected on a living-room wall, controlled by hand via computer vision + projection mapping.
Codex · Games · by Hank (X post, 20 Sep 2026) · source
- Turn a 3D-scanned object into an iOS game with Codex
A 3D-scanned firewood splitter went from a three.js web toy to a native iOS app with leaderboards and friend challenges.
Codex · Games · by Gavin Shapiro 🐧 (X post, 23 Sep 2026) · source
Manus for games 1
- Build and publish a playable game from one prompt
Manus 2.0 built a 3D world, combat, soundtrack and SFX, then playtested and published “Echo Isle”.
Manus · Games · by Min Choi (X post, 12 Oct 2026) · source
Devin for games 1
- Simulate a tiny AI civilisation for $0.02
48 citizens, Jev picking actions, GPT as world director, Devin building the Three.js world; code enforces the rules.
Devin · Games · by Lovepreet Singh (X post, 21 Sep 2026) · source
Antigravity for games 1
- Build an Unreal Engine game mission with Claude Code
Loadout menus, shooting mechanics, bullet effects and ragdoll physics built in Unreal with Claude Code.
Claude, Antigravity · Games · by Brendan Jowett (X post, 12 Oct 2026) · source
Questions people ask
What is the best AI agent for making games?
There is no single winner in the data. Of 29 games use cases on agentsetups, Claude (21), Codex (6), Manus (1), Devin (1). Pick the one whose examples look most like your task.
Which AI agents do people use for making games?
From the sources: Claude (21), Codex (6), Manus (1), Devin (1), Antigravity (1), Amp (1), Grok Bot (1).
How do I set up an AI agent for making games?
Copy a setup that already worked. Decompile a full game with a long-running agent swarm by momo5502 (Claude, Codex): 1) Start with 3 worker agents decompiling and committing, plus 1 reviewer that coordinates and flags bugs; communicate via Discord. 2) Trigger compaction earlier (they cut the threshold from 90% to 42% context fill) to save tokens. 3) Stop the reviewer trusting workers’ comments: verify deviations against the original independently. The use-case page has the full prompt.
Claude vs Codex for making games?
Claude has 21 and Codex has 6 games use cases here. Compare them side by side.