The Thunderstorm skull upgrades your enemies, so like they go up in rank, it makes it 1.5 times harder, and they are worth more points when playing the metacampaign, which is basically playing for points. and are often used to get the metacampaign achievements.
Source: 4 Years of playing Halo 3
Hope i helped
The Iron skull, when activated, reverts your game back to the previous checkpoint if a player dies. This is modeled after the default on the legendary setting in Halo and Halo 2; if a player dies, all the players are reset at the last checkpoint.
It makes the enemies shields stronger and you have to take them out with a plasma weapon or else it will be hard
It makes it so that enemys are 1 rank higher like regular brutes will be captains and captains will be gravity hammer chieftans and gravity hammer chieftans will be plasma turret chieftans.
No
The first skull on halo 3 is a silver skull. Silver skulls do not award any achievements.
After finding a halo 3 skull, simply pick it up as you would any other weapon.
once you get a skull in halo 3 you can co to the campain options and turn it on different skulls do different things
13
http://www.halo3planet.com/halo-3-skull-locations/ is were I found them
You do not jump through rings to get the tilt skull in halo 3.
the fog skull takes away your radar. you find the skull on floodgate
There are not skulls in Halo 2! It's just Halo 3!
you walk on top of it
halo on your faceinit blad diary of a badman rules
you need to be playing on normal,heroic,legendary to find any skull on halo 3