Very much like deathmatch, only this time you play as a team. The score is the cumulative score of the entire team, not just your own. And remember, you only score for killing the enemy, so make sure you know what team you are on, and kill guys from the opposing team.
Kill all members of the opposing team, and keep control over the spawn points.
You can spawn at any spawn point controlled by your team.
You get team points by neutralizing or capturing enemy/neutral spawn points.
No team death match specific bonus points to be earned.
Even though this is a team game, this game mode can often be settled by individual players skills. But there are still ways to make sure your team has an edge on the road to victory: