You get XP by winning matches in matchmaking. If you lose the match, then you lose XP. Simple.
keep doin matchmaking.
When you win or come in the top 3 of a multi player game that is free for all online you get 1 exp point. If your team wins online in a team match you get 1 exp point. If you win or come in the top 3 ( depending if it is team or free for all ) on a double exp game you get 2 exp. -double exp games only are playable on Thursday through Friday.
Grifball is a Double EXP Weekend playlist on Halo 3 matchmaking. It resembles football, but with bombs, swords, and Gravity Hammers! Grifball can be played in Halo 3's online multiplayer whenever it is featured as a Double EXP Weekend playlist.
you need to have 100 exp and 10 skill level to become a lieutennant (officer) on halo 3
As far as I know, you can't because their isn't any online Option in Halo 3 ODST; Campaign Disk, BUT if you were to use the Multiplayer disk, you can get online/matchmaking, and play online, and get anywhere between 1 and 3 exp for games.
just by playing online matches and earning exp. I think you need to get 600exp. to become a general.
You win games to earn EXP.
Go to Halocharts.com to see
if you lose too much on a ranked playlist in matchmaking you can lose exp
100 exp. and a skill of at least 10
No all 1000 need to be on halo 3
yes if the exp goes under the exp that you needed to go up a grade u will be degraded