EXP (Experience Points) are awarded to players based on their performance in a Halo 3 multiplayer match. Along with skill, EXP determines a player's rank and advancement in rank. Points are awarded thusly^[1]: You will not see if you have earned or lost EXP points until you exit to the lobby.

• Win: 1 EXP
• Tie (Only in Team games): 1 EXP
• Loss: 0 EXP
• Quitting/Disconnecting from the Match Early or Get Booted for a Betrayal: -1 EXP (does not always occur)
• Win a Double-Exp: 2 EXP

EXP is only lost when a player leaves a match before it is over. This penalty typically only applies to team matches, in any playlist. Disconnect counts as quitting, which means that accidental quits through power or internet loss will be treated the same as quitting the match through the menu.

In a free-for-all match, such as Lone Wolves or Rumble Pit, a player is considered to have won if he finishes in the top half; as in a team match, a player wins if his team wins (multi team games involves placing 1st or 2nd, essentially the top half again).

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