Claude Opus 5.5 Experiment Produces Playable Unity RPG Prototype in 36 Hours

A public experiment using Claude Opus 5.5, Unity, Blender and generation APIs has produced a playable old-school MMO-style RPG prototype after 36 hours, with the creator estimating $2,175 in API-equivalent model usage and about $227 in asset-generation spend. The demo is a practical stress test of the agentic workflows Anthropic is positioning Opus 5.5 for: long-running coding, subagent coordination and multimodal tooling, rather than a finished commercial game release.