Atlas

The Atlas is a large Cerberus mech encountered in Mass Effect 3. While they tower over any human, they have a weak point in the cockpit where the driver sits. If the driver is killed before the Atlas mech is destroyed, Commander Shepard can gain control of it and use it as a vehicle.

Capabilities
Offensive

The Atlas is equipped with a powerful rocket launcher and a rapid-firing mass accelerator cannon. At close-range, it can pick up enemies with its claw and instantly incapacitate them.

Defensive

The Atlas possesses extremely durable shields and armor, and can shoot smoke grenades.

Tactics

 * The Atlas is slow and makes for a large target, but should not be underestimated. When attacking the Atlas from the front, take cover immediately and watch for when it moves its rocket launcher arm to fire. Under no circumstances should an Atlas be attacked at melee range; the Atlas can easily grab the player for an instant kill. Sustained weapons fire and powers should eventually destroy an Atlas provided the player can attack from a safe distance and in cover.
 * The Atlas' cockpit window can be shattered after its shields have been taken down. This requires a considerable amount of sustained fire, but breaking the window will leave the pilot vulnerable to attack. Killing the pilot will destroy the Atlas immediately in multiplayer. In some instances in the campaign, however, this will leave the Atlas intact and able to be piloted by the player.
 * The Atlas can be successfully attacked with Sabotage and turned against other nearby enemies.
 * In Multiplayer, a single Cobra Missile will instantly kill an Atlas and if well placed, can take out multiple Atlas's at once.