Matches come from the tags Steam players vote on each game, weighted so a rare tag counts for far more than one that sits on half the store. A game's popularity never moves it up this list.
The closest matches to Opus Magnum on Steam are SHENZHEN I/O, Infinifactory, SpaceChem, MOLEK-SYNTEZ, EXAPUNKS. They rank highest because their Steam community tags overlap most with Opus Magnum's — shared tags include Programming, Automation, Logic.
How are games like Opus Magnum chosen?
Every game is described by the tags Steam players vote on it. Rare, specific tags such as Programming, Automation, Logic count far more than catch-all ones like "Indie" or "Singleplayer", and each game is scored on how closely its whole tag profile matches Opus Magnum's. Popularity never affects the ranking.
