Claude for Making Games

Claude is our default first pick when we generate a new game, and the October 2026 model lineup (Opus 5.5 for heavy lifting, plus faster tiers for iteration) has only widened its lead for our use case. In repeated side-by-side tests it is still the most dependable tool for producing a complete, runnable single-file HTML5 game on the first or second prompt: the code comes out organized — Opus famously separates game state, rendering and input into clean modules — the game loop is usually correct, and edge cases like restart logic and touch controls need fewer follow-up fixes than with other assistants. Two current-era features matter specifically for games. First, artifacts: the whole game lands as one self-contained HTML artifact you can play instantly in the preview pane, then download and host anywhere. Second, XML-tagged prompting is now officially recommended by Anthropic for complex builds — wrapping the rules, controls and tuning numbers in tags like <rules> and <constraints> measurably reduces misinterpretation on game logic. Our house prompt style (see the prompt library) bakes both in, along with the "fixed numbers" technique that 2026 prompt guides keep rediscovering: state lives, hitbox sizes and speeds as concrete numbers instead of letting the model guess. Games like Neon Serpent, Void Dodger and Pixel Jump on this site were generated with Claude and published after only small tuning passes.