| Type | Contents | Size | Use Case | |------|----------|------|-----------| | | Every official game + revisions | ~15–20 GB zipped | Archival, emulation frontends (RetroArch, LaunchBox) | | 1G1R (One Game One ROM) | One preferred ROM per game (e.g., US/EUR over JP, newest revision) | ~6–8 GB zipped | Clean library, less duplicate clutter | | "Best of" Packs | 50–200 most popular games | 1–3 GB zipped | Casual play, handheld emulators (Miyoo, Anbernic) | | Homebrew & Hacks | Fan-made games, translations, QoL hacks | Varies | Niche collections |