Halo 3, Halo 3 ODST, Halo 3 Mythic??

Games Other Halo
1

I have a multidisc of Halo 3 ODST
When I put in the multiplayer disc & accept a Halo 3 game invite, it comes up that I have Halo 3 Mythic
Yet the case states to contain the complete Halo 3 collection
How am I able to play Halo 3? Do I have to buy a separate Halo 3 disc?
Does Mythic have the ability to be disabled?

2

I have: https://www.halowaypoint.com/en-us/games/halo-3-odst/xbox-360
Trying & wanting to play: https://www.halowaypoint.com/en-us/games/halo-3/xbox-360

3

You have the complete MP collection from Halo 3 (the disc is called Halo 3 Mythic). That disc comes with all multiplayer maps.
I you want to play the Halo 3 campaign you’ll have to buy the normal Halo 3 disc.

4

> 2533274870489921;3:
> You have the complete MP collection from Halo 3 (the disc is called Halo 3 Mythic). That disc comes with all multiplayer maps.
> I you want to play the Halo 3 campaign you’ll have to buy the normal Halo 3 disc.

^ This