MechWarrior Online and go out there all guns a-blazing, think again. You first need to learn how to pilot such a machine, which the developers say is quite unlike your traditional MMO avatar or vehicle.
For one thing, you need to consider that parts of the 'Mech work independently of each other. You can be going in one direction, have your torso twisted to face another, and have your arms moving in yet another. Plus, there is the issue of heat generation -- and shutdown -- to consider.
So take a moment to brush up on these basics with a developer video on the subject after the jump. Your life may just depend on it.