Port radar

How a copy is found — and what that misses

• Title match. A copy counts when its name matches the Steam name once case, ™ and ®, apostrophe and quote styles, punctuation, and a trailing edition or platform word (“Remastered”, “Director's Cut”, “Deluxe Edition”, “PS5”, Xbox's “(Game Preview)”) are set aside. Added or dropped subtitles, numerals (“II” vs “2”) and localized names still miss.
• Maker check. When both rows name a developer, one of the Steam game's developer or publisher must match one of the copy's, ignoring words like “Studios” or “LLC” — so an unrelated game reusing a title is not counted. A port credited only to a porting studio still misses. It cuts the other way too: when either row has no developer listed, the title alone decides, and a shared publisher alone is enough — so an unrelated game with the same name, or one from the same publisher, can be counted as a copy.
• The platform's own games are left out. A game Sony published is not a PlayStation port lead, nor Microsoft's (Xbox Game Studios, Bethesda, Activision Blizzard) an Xbox one, nor Nintendo's a Switch one — judged by the Steam listing's developer and publisher. Each platform says how many it set aside.
• Our catalogues, not the stores'. PlayStation is the US store's catalogue walk; Switch is Nintendo's Americas catalogue, which our index walk covers only in part; Xbox is the US market. Our App Store and Google Play catalogues are built from their charts and searches, so a phone game that never charted where we look may not be in them at all. Delisted copies do not count.

So “no copy found” is a lead to check, never proof that no port exists — and if you know otherwise, each platform's list has a form to tell us. Revenue is our modeled Steam estimate (≈, see the methodology); chart positions are each store's best in the last 30 days, US or worldwide chart.