Note: This trick works better in a multi-player map that has large open ground. When you have successfully upgraded your rocket launcher (at least heat seeking), lock on to you desired targets. After that, aim straight up and fire. Your rockets will then act as heat seeking mortar bombs. This allows you to hit indirect targets and it is nearly impossible for your opponents to predict and dodge. This also helps with enemies who are fairly close to you. Your rockets will split into four and bomb your enemies from above.