How do I restart the Halo 3 campaign?

[I Has Hamster!!!]

I started a halo 3 campaign and am on the 4th mission but i just found out that i am on easy and its too easy but i don't know how to restart my campaign on a harder lever?
all i have on my start screen is
continue campaign
start co-op campaign
matchmaking

can anyone help?

 

[Leoo]

Just delete all your Halo 3 achievements on your Xbox 360 Hard drive.
You can do this by going to the dashboard.

Or just make a new gamertag and start right from scratch.
Or just change the difficulty of the level right before you start it.
Good Luck.

 

[Shivam G]

it s only one difficulty that is easy so complete it and mod it ok

 

[Onetuff2handel]

If you go into your actual hard drives contents from your 360's dashboard you can actually delete all of your save files and start brand new as if you had just bought the game.