Sorry there arn't any, The only skulls are in "Halo 3" Which are used in "Halo 3 O.D.S.T."
find the skulls
Find them your self
what do you think retard they looked!
No you must find and claim them
find skulls and get achievements
Please visit the Gamespot game guide for Halo 3. There you will find all the locations of the Halo 3 skulls.
Search for Halo 2 skulls on www.youtube.com and there will be a selection of videos showing the wereabouts of the skulls or how to get them : )
you can find a video walk-through on youtube.com
find all 13 campaign skulls
You have to find all the skulls in campaign mode.
They are skulls. idiot.