The creator's post

I might be showing my age here, but one of my favorite games was Theme Park from 1994, which I played on the Amiga. Its co-designer and lead programmer was none other than Demis Hassabis, co-founder of Google DeepMind. So I used it as inspiration for a web-based clone I called Scheme Park and put GPT-6.1 Sol against Claude Opus 5.5 to see how well they can actually build games. For GPT-6.1 Sol I used OpenAI's new official Game Studio plugin for Codex, which comes with a bunch of skills for web-based games. After seeing the poor result, I threw a bit more compute at it with GPT-6 Astra and the same plugin, but it still wasn't much better. For me, Opus 5.5 clearly wins this one with an enjoyable clone of the game, nicer graphics and also better synth tunes and FX. With Opus I took 3 iterations: I shared the idea and a little input, we decided what's feasible for v1 so created the spec and then finally used that as a one-shot prompt and it built a game that worked perfectly on the first try. Quite impressive. Judge yourself watching the demo of all the results. Have you also tried some of the latest frontier models for retro game development?