Xbox App (PC/Mobile) / Console Store: Search the game title. If BC, it shows a “Playable on: Xbox One, Xbox Series X|S” badge and an “Install” button if owned.
My Games & Apps → Full Library → “Ready to Install”: Filter “Xbox 360” — shows all BC titles tied to your account.
Physical Disc Verification
Insert the Xbox 360 disc into your Xbox One/Series console.
If BC: Game icon appears on Home; select to download the emulated version (disc acts as license key — must stay inserted).
If not BC: “This game isn’t playable here” error.
Retailer Listings
Amazon / GameStop / Best Buy product pages often note “Backward Compatible” in description.
Critical Caveats
Not all games are BC: ~600 of 2,100+ titles. Licensing, technical, or publisher issues block many.
Updates required: BC titles download a specific emulator package; needs internet first time.
Multiplayer: Original Xbox Live 360 servers often shut down. BC multiplayer works only if the title uses cross-gen parties or has dedicated servers still up.
DLC: Must be purchased/downloaded on the same account; sometimes requires launching via 360 dashboard emulation first.
Always check the official list before buying a disc for BC purposes.