The Geth Armature is a mobile anti-vehicle and anti-personnel unit employed in high-risk areas, often dropped directly from a Geth Dropship. The unit consists of a quadruped "tank" or "walker" and is usually accompanied by Geth Rocket Troopers. Armed with superior firepower and a Siege Pulse assault cannon, this geth is easily a match for the armored vehicles of other races. Its main armament is deadly but slow to recharge, but the Geth Armature compensates by knocking down infantry with a smaller secondary weapon, which, while not as powerful as the Mako's, fires more rapidly, making it very dangerous to engage an Armature at close range.
Armatures are sentient, synthetic lifeforms capable of independent thought, learning and action. When inactive, Armatures fold into a compact state, allowing them to be packed into containers, or place themselves in small spaces. This feature, combined with their armaments, makes Armatures perfect for garrison forces or for ambushes.
The Geth Colossus is similar to the Armature, but is both larger and more heavily armed.
In the game, Armatures are typically encountered in areas where the Mako is expected to be driven. The Siege Pulse can kill foot-mobile infantry in one shot, so duck when the Armature is readying for the shot (it takes several seconds for the weapon to recharge.) The Siege Pulse also depletes the Mako's shields quite fast but the blast can be avoided through the use of the Mako's propulsion jets.
A good tactic is to ram the Armature, which will knock it down briefly and allow the Mako to attack with its cannon while the Armature is struggling to stand up. If the Armature's shields are down, two or three (depending on difficulty) consecutive shots from the Mako's cannon should be enough to destroy it, even when the Armature is at full health. If the Armature has smaller geth troops around it, it's generally a good idea to destroy the foot-mobile infantry first and then concentrate on the stronger Geth Armature afterward. In general, Armatures aren't a very big threat in the Mako; their siege pulses, while highly damaging, can be easily dodged at a range, and even if they connect the Mako can take far more damage than an Armature can.
On foot, the best tactic is to Lift the Armature—which will leave it helpless and disable it for several seconds when it lands—then hit it with tech skills like Sabotage and Overload. Only Master Throw is capable of knocking down an Armature. Shooting the Armature with Tungsten Ammunition, especially combined with Assassination, will cause huge damage very quickly. Defensively, characters with a high level Immunity active can survive even direct hits from an Armature's main gun especially if wearing heavier armor with damage protection mods equipped, however direct hits can cause knockdowns, so being evasive is still a good idea. As the main cannon shots do have an area of effect, fragile characters should be kept away from tougher characters that can tank hits.
If you prefer using a sniper rifle against Armatures, find high ground in a position where you're safe from its Siege Pulse before using Assassination. AI Hacking is also effective especially if other geth are around, but it has to be at Master rank to work on Armatures directly. If the Armature is very close, keep moving (sprint, if possible) to avoid the Siege Pulse or one blast can wipe out your entire team.
Additionally, you can combine the two tactics. Ram the Armature and park the Mako on top of the stunned geth, preventing it from recovering. Exit the Mako and kill it with small arms fire. Killing it while on foot will also yield a higher experience reward. Check your target, as the Mako is vulnerable to friendly fire.
If for some reason during the struggle you should find yourself overwhelmed, or if there are two Armatures, use Stasis. Stasis will get the Armature out of the fight and give you time to plan, or if there are two Armatures, putting one in Stasis allows you to concentrate firepower on the other. The quickest way to kill an Armature is by ramming it into environmental hazards; e.g. lava, or ramming it over the edge of the Prothean Skyway on Feros or the cliffs on Noveria will kill it instantly.
Armatures have a high level of tech and biotic resistance compared to most lesser foes, so all such talents suffer reduced effectiveness AND duration against them, so having fast recharge times and staggering out your team's abilities so as to not overlap them needlessly is important to keep them disabled long enough to shoot them down on foot. Consider turning Squad Power Use off.
Armatures are slow to turn and can only fire their big pulse weapon directly to the front, therefore, if on foot, constantly strafing right or left while continually firing can bring an armature down with little, if any damage taken, especially with higher level weaponry.
- Geth Armatures debuted in the X06 demo, during the battle on Caleston; Shepard commented that the geth wouldn't deploy an Armature just to kill a few trapped miners, and its presence piqued the commander's interest. Also, the armature shown in the X06 demo is almost three times the size of the armature encountered on Therum.
- On almost all official screenshots of the Geth Armature, the mass accelerator cannon is clearly visible just below the Armature's 'flashlight'. In-game it has been removed, possibly to aid the Armature's 360-degree targeting.
- There are several Geth Armature recharge stations on Ilos. If you have a high Decryption skill these can be hacked, activating friendly Armatures who will fire Siege Pulses at the other geth for you.