User launches Steam → GreenLuma DLL injected → Steam API hooked ↓ App ID requested (e.g., 730) ↓ Check blacklist array (in memory) → If ID present → Return FALSE (not owned) ↓ If not blacklisted → Apply spoof/manifest logic → Return TRUE The blacklist check happens before any manifest spoofing. Even if you have valid depots, a blacklisted ID will never appear owned. 5. Default Blacklisted App IDs (common) Here is a frequently seen default blacklist:

// Before: if (IsBlacklisted(appID)) return false; // After: // if (IsBlacklisted(appID)) return false; Some modified GreenLuma builds introduce a whitelist mode :

BlacklistedApps=730,570,440,10 (730 = CS2, 570 = Dota 2, 440 = Team Fortress 2, 10 = Counter-Strike 1.6) When GreenLuma intercepts ISteamApps::BIsSubscribedApp or ISteamUser::GetUserOwnedApps :

| Version | Blacklist Location | Format | |--------|--------------------|--------| | GreenLuma 2020 (original) | GreenLuma_2020.ini | Blacklist= line | | GreenLuma 2024 / Reborn | GreenLumaSettings_2024.ini | BlacklistedApps= | | Some repacks | blacklist.txt (next to GreenLuma.exe ) | Plain list of IDs |

GreenLuma (often GreenLuma 2020 / 2024 / Reborn) is a Steam client patcher/DLL injector. Its primary function is to bypass Steam’s app ownership checks — allowing you to launch games/apps you don’t technically own, usually via sharing manifests, depots, and app IDs from another account or cracked content.

Example from GreenLumaSettings_2024.ini :