They have no effect on multiplayer mode. They only take effect if plating campaign.
you can get all of the skulls on multiplayer. =)
multiplayer achievements and skulls
No you must find and claim them
No you can't.
They are in secretive places. There are ones in Multiplayer and in Campaign. http://www.halo3planet.com/halo-3-skull-locations/ - this is a good site but you can search on youtube, they have good tutorials.
Sorry there arn't any, The only skulls are in "Halo 3" Which are used in "Halo 3 O.D.S.T."
get all the skulls easily u can you tube it also u can play multiplayer online to unlock items getting halo ODST u can unlock recon by doing the vidmaster challenges in halo odst and halo 3
They are skulls. idiot.
to get the helmet get all skulls (including the gray ones) the shoulders or maybe it's the chest unlock at 5 skulls. The Chest or maybe it's the shoulders take 3 skulls. For the katana (the sword on your back that you cannot use) needs 1000 Halo 3 Gamer score points. P.S. if you have ODST you can find the skulls on the multiplayer maps and if you pick it up it gives you 30 more achievements for halo 3!(Including the one you just got for picking up this skull on a multiplayer map) Also this is all on the second disc that comes with ODST since the first one has it's own Halo 3 ODST achievements.
ok, go to youtube and type in "how to find all halo 3 skulls" then watch the video and get the skulls. yes, its that simple.
if you want to know where the skulls are all you have to do is go to youtube and put in "halo 3 odst mythic skulls" and it will show you how to get to them
There are many skulls located throughout the campaign in Halo 3, as well as on the Mythic Multiplayer maps. Walkthroughs for individual skulls can be found on many websites, including Halopedia.