Build an ad-free app of 253 arcade, board and puzzle games

The poster, u/PaddleStroke, started by asking Claude on Opus 5.5 to recreate simple retro arcade games in the style of ad-laden mobile hits. It went well enough that they kept going: more than 35 arcade games, then over 150 classic board and card games such as four in a row and chess to play with their children on the train, then logic gate puzzles modelled on a game that had vanished from the Play Store, and then other classic puzzle games with levels. Everything was gathered into one app.

The result is a single app with 253 games, free and open source on GitHub, published on Google Play, with no ads or paywall and translations into 22 languages. A tip is the only in-app purchase. The poster gives no figures on time or cost.

The harness was not named; the poster only says Opus. A commenter who read the code found an out-of-bounds write in one game's level loader that a crafted level pack could trigger, and said Claude had made the same mistake for them, so review code that parses files. Another asked whether generated logic puzzles were checked with a solver, since some may have no solution; there was no answer.