halo odst 360 version not compatible with xbox one

hey so I recently bought halo 3:ODST and when I put it in my xbox one it said it wasn’t compatible. Why?

Because not all titles are backward compatible yet. Kinect games for Xbox 360 will apparently never be backward compatible.

They just haven’t added ODST yet.

ODST is on MCC right now but if you want to play Firefight, your gonna need to play on the 360