It makes the npc's say funny things.
I Would Have Been Your Dad (IWHBYD)
The iwhbyd skull makes Your enemies (the covenant) Use more melee Attacks
To unlock the "I Would Have Been Your Daddy" (IWHBYD) skull in Halo 2, you need to complete the mission "Quarantine Zone" on any difficulty. During the level, after you encounter the first Flood, look for a hidden area on the left side of the map. You’ll need to jump onto a structure and then make your way to a platform where the skull is located. Once you find it, simply walk over to collect it.
iwhbyd adds special dialogue throughout the game
There are no cheats, however there are the good old fashioned skulls which make the game more entertaining, such as, Grunt Birthday Party and IWHBYD skull, although they give you no real advantage they are very entertaining
i DONT KNOW FIND OUT YOURSELF
there is no halo zero 2 there's halo zero halo PC (1) halo for vista (2) and halo 3
No there is only one Halo Reach. Other editions in the Halo saga include Halo, Halo 2, Halo 3, Halo Wars, and Halo ODST.
.. No, Halo 1 and Halo 2 and have different story's
If you are talking about the Halo ring in Halo 2, it would be Installation 05, also called Delta halo.
halo 2
No, there are no Mongooses in Halo 2.