1 Flag CTF

1 Flag CTF is a game of Capture the Flag. This game type places two teams on opposite sides of the map with a "base." Like most games, you can't shoot while holding the flag and you usually can't get into a vehicle when holding the flag either. However, you can get into sideseats, such as the passenger seat in the Warthog, or you can change vehicle boarding in quick options while in the pre-game lobby. As the title says, only one team has a flag. So, you only need to worry about offense/defense one at a time. Some maps good for this are Zanzibar, Headlong, Ivory Tower, Relic, and Terminal.

Objectives
One team is offense, their job being to infiltrate the enemy base, whether by stealth, brute force, or other tactics, and grab the enemy's flag. Then, the flag carrier must return the flag to the flag stand in their own base to score a point.

The defense's job is quite obvious. Defend the flag, and if it is captured, kill the carrier, and guard the flag until its timer runs down and is returned to base.

Strategies
Some good strategies are to always have a good sniper covering the flag to make sure the other team doesn't get it. You should have someone with a good close combat weapon (Energy Sword, Shotgun) go in for the flag with the sniper covering him, and if the carrier gets into a bad situation, he could drop the flag, slaughter his opponent(s), and then resume on his trip back to base.