Claude Code plus an Unreal MCP server produced a playable Souls-like boss fight in 72 hours.

An r/ClaudeAI post documents building a boss encounter in Unreal Engine 5.8, with Claude inspecting the project, reading and modifying existing Blueprint logic, wiring weapons, setting up boss AI and handling dynamic camera switching from prompts like "here's the boss, here's the player, connect this weapon, check the Blueprint setup, switch the camera when the fight starts." Asset work stayed manual plus 3DAIStudio. The transferable point is that MCP against a live engine editor lets the model read existing visual-scripting state rather than only emitting text, which is where most game-engine agent attempts stall.