Files identical by SHA-1 and size across the latest public manifest of every depot on file, after dropping engine and runtime files by path and every file under 64 KB; a pair needs 20 files or 50 MB in common, and a cluster is any set of games joined by such pairs. Shares are the shared bytes as a fraction of each game’s content bytes. Only games the SteamPeaks account owns are indexed (2,379 today). The verdict names the overlap, not its reason. Data by SteamPeaks.com.