The Rocket Launcher basically launches rockets. It is the heavy assault weapon available to each team (in the Battlefront series). The rockets it fires travel fairly slow, so you will have to aim ahead of a moving target. By locking onto a tank or machine, a red circle will appear around the target, allowing you to take it down even quicker. This gun is the best there is for taking out things with lots of health, and can also take out nearby enemies by shooting at their feet. The one thing you have to be careful with is the very limited amount of ammo the gun carries, allowing you only a few shots before you have to get more. It must reload after almost every shot.
Clone Rocket Launcher
In the first Battlefront game the rocket launcher shoots two shots at once (although the vehicles have much more health).