Halo 3, how do I earn experience and what is The Forge for???

[Ambro]

Nough Said. best non sarcastic answer gets my 10 points.

 

[EvilRepublican]

You get one exp for winning a Social or Ranked match, and Forge is to design new maps.

 

[buddy]

you earn exp for every match you win on xbox live

the forge is so that you can edit maps and play them with friends online or offline. you cant edit everything but you can move or delete things like weapons or vehicals