When you are playing capture the flag on split sreen, there are ways to make things easier. This is most helful when you are playing with at least 4 people per team (using a system link) and I will use the level "Coagulation" as an example, though you can tweak the explenation to fit all levels that support vehicles(scorpions help, but you should have a warthog/specter), first you must load up a warthog/specter(W/S) with as many people as you can, but at the very least, two. Drive the W/S quickly to the other side of the battle field and let the passenger get out of the vehicle so they can pick up the enemy flag. Drive around once or twice around the base to clear out as many enemies as you can, then pick up the person with the flag. You must have them get in the passenger seat because that is all they can do with the flag in thier hands. As soon as they are in, gun it to your base and place the flag where it goes to score. Repeat this as many times as you need to in order to win. However, your enemies might wise up to this strategy and either copy or attempt to prevent it, so they will probably keep guards on the flag (a good idea for you to do as well). If they do, then instead of having one person grab the flag, have everyone jump out to help clear the guards, then finish as directed above. The more people you play with, the harder this will be, I advise using the warthog because the gun is better than the specter, and the vehicle itself is faster. If you are playing with a full 16 people, this tactic will be hard because they will probably have about 4 guards, a little too much if they are any good at the game. In this situation, overload your warthog with passengers, have the three seats be taken plus a couple of people jump on top of it for reinforcements.