There is always a hole in any disk. It allows the laser reader to completely envelope the informational side of the disk so that it can read the information needed to run the program. Don't worry, there is nothing wrong with your disk.
Yes.
You need the Halo 3:ODST campaign disk.
No, the Halo 3 game disk has both the campaign and multiplayer mode on it. What might seen confusing is in Halo: ODST, the game comes with two disks. One disk is for the Halo: ODST game and the second disk is for the Halo 3 multiplayer with all the latest map packs on it such as Mythic
The Halo Odst Disk 2 comes with all maps (Plus 3 extra), and the ordinary halo 3 disk comes with no added map packs, so you don't have another 12 maps.
The HALO REACH multiplayer beta is coming in May. When it does come out put your Halo 3 ODST game disk in and in should be on the Disk menu.
you have to have odst and it comes with an halo 3 mythic multiplayer disk and you get it with that
If you mean the Multiplayer disk that came with ODST then yes, but if you mean the ODST campaign disk then no.
buy disk cleaner from the store.
If you install it into you're hardrive then you don't need a disk at all. You simply access the game from the games section.
no
There is no way to get it without the Halo 3: ODST Campaign disk.
Getting the katana sword would mean you would have to unlock every achievement in the game. So you would need both the regular Halo 3 disk for the Campaign achievements and the mythic disk for the online and multiplayer achievements.