343 Industries have announced that four Xbox 360 Halo games will be coming to Xbox One backwards compatibility later this year.
Halo 3, Halo 3: ODST, Halo 4, and Halo: Combat Evolved Anniversary will be coming to the Xbox One backwards compatibility programme. Both campaign and multiplayer modes for each game will be included, the games will also support cross generation LAN connections.
Everyone one of the games DLC packs will be made free to download as well. According to 343 this is to make sure the player base is not fragmented.