Team Deathmatch is a Multiplayer game mode that is the most common gametype, fight your enemy working alongside your team mates.

Domination is a multiplayer game mode featured in Call of Duty 4: Modern Warfare and Modern Warfare 2. There are three flags scattered about the map that begin as neutral. Teams gain points by capturing these flags. Domination is a very popular game mode thanks to its high rewards and tactical game-play.

Free-For-All (FFA) is a game mode for 8 players where it is every player for himself. While a few years back it might have been the most popular match type and the standard, in this new age of gaming, FFA games are much less popular.

A massive TDM, capture the points to defeat your enemy.

Similar to Search and Destroy but the main difference is the addition of respawns, in Demolition the player may respawn as many times as they need. Other differences include a maximum of Three rounds per game and an overall score limit of 2. Also, both bomb sites must be destroyed within the given time limit(although destroying one site will increase the game's time limit by around 2 minutes) and every player has a bomb.

Attacking team: Eliminate all enemies, or destroy an objective. Plant the bomb on one of two objectives, indicated by an A or B, then defend it until there is not enough time to defuse it. Note that the bomb can kill any nearby enemies, and the person who planted it. Defending team: Eliminate all enemies, or defuse a planted bomb. Remember that it takes 5 seconds to defuse the bomb on stock settings. Even if all enemies are eliminated after the bomb is armed, the attackers can still win the round if the bomb explodes. Victory is achieved as soon as the bomb is defused regardless of how many attackers are still alive. Defusing the bomb is very loud, and can be heard from quite a distance. If no bomb sites are destroyed, the defending team wins if the time limit is reached regardless of how many defenders versus attackers are left alive.

This mode is obvious; to capture the enemy flag while attempting to defend yours. Realistically, capturing a flag is, as always, a key component of military success.

Mosh Pit is a random combination of all game modes, often found in COD4: MW2.

At the beginning of a match, or if the headquarters has recently gone offline/been destroyed, a table with a laptop on it will appear somewhere in the map. It will stay inactive for 30 seconds before players are able to begin capturing it. If your team captures the HQ, you must defend the Headquarters, if the enemy team captures the HQ, you must destroy the HQ.

The Tournament creator will specify more details on the Game mode etc. E.g, may be multiple game modes / games.