Paladin

Unreal Tournament 2004
The Paladin is a vehicle in UT2004, introduced in the Editor's Choice Edition and is a stock vehicle in Unreal Tournament 3, as an Axon Vehicle. It is a defensive-oriented vehicle. Locomotion is provided via eight wheels and is rather slow, but to make up for it, it has a powerful defense attack.

Primary fire makes the Paladin shoot an Ion Blast, which makes considerable damage in a small area of effect. This is an offensive attack.

Secondary fire creates a large energy shield, which protects the Paladin and surrounding units from any attack. Unfortunately, the shield can only protect one area around the Paladin, and the shield also needs a recharge time when it is exhausted. This is a defensive tactic.

Note that the shield will stop attacks - be they projectiles or hitscan - but anything else - Players, other vehicles, etc - will pass through the shield harmlessly. For this case, by pressing Primary fire while the shield is up, the blast will detonate around the shield, and then release the energy in the general area around the tank, commonly called the "Shockwave." This is a very useful ability, and it helps counter the tank's weakness of slow mobility by allowing it the chance to free itself if it gets mobbed.

Unreal Tournament 3
"This all-terrain vehicle features a signature projection turret with powerful offensive and defensive capabilities that are unique to Axon design. As an offensive measure, the projection turret launches high-speed plasma cores at long range, which discharge on impact with a wide-area explosive force.

While more than capable on the offensive side of a battle, the defensive capabilities of the Paladin are unmatched in modern warfare. The projection turret can also deploy a large energy shield matrix that is strong enough to completely protect the shielded area from any and all incoming fire.

As a last resort measure, the projection turret can even launch plasma cores directly into its own shield matrix discharging them around the entire perimeter of the Paladin with a burst of energy that is deadly to any nearby dismounted infantry."

- UT3 manual