Chrome pyramid/Killing

Killing a chrome pyramid is a difficult task, and tedious. However, killing one grants the an achievement. There are multiple ways to go about it, each with their own caveats.

The easiest method is to find a Obliterate Faction relic and then activate it to eliminate all robots on the screen. It counts as your kill.

For those of you who want to do it the old fashioned way, read on if you want.

Attacks to defend against
The chrome pyramid has two main attacks: a spray of HE missiles and a dangerous unresistable melee attack(~18 PV, +10 to hit) if within melee range and the swarm rack is removed in any way. The missile attack is the least dangerous attack. With enough DV and being away from anything that can be hit will completely nullify any damage. It starts with 100 HE missiles, with the swarm rack firing 10 each round. It can also fabricate 20 more once it runs out for 100 HP. It can only do this every 2-4 turns. It is slow but it is possible to slowly whittle away the pyramid's HP by forcing it to fabricate missiles every turn it can. This can help in the long run if you're not doing the decapitation cheese strat.

Removing the Shield
If you're not dealing piercing damage with missile weapons, you'll have to remove the shield to get into melee range to attack. There are four main methods: If the force bubble is also damaged in anyway, it will not fully regenerate itself until all of the force bubble is destroyed, so plan accordingly.
 * Be True Kin and have to walk through it
 * Use any source of Normality to destroy the walls (this will also affect yourself as well)
 * Use any source of EMP to disable wall generation (this will also affect yourself, unless your stuff is Electromagnetically-shielded, or if you're using Electromagnetic Pulse
 * Make the pyramid destroy its own force field by making its missiles detonate near it

Damage Methods
After removing the shield and possibly lowering the HP after forcing it to fabricate some missiles after a while, you need some actual damage to count as your kill for the achievement. This obviously ignores methods using wishes, but you can just wish  to instakill the pyramid and get the achievement.

Normal Method
Have a weapon that ignores AV, or have an electrified mod (the pyramid near resists everything except electricity) on your melee weapon. and then you just slowly whittle down the HP until it's done.

Decapitation
This method relies heavily on the fact that Serrated does not need the attack to penetrate to proc. Learn Decapitate, get into melee range, and then whack away with your serrated long blade/axe and wait for it proc. This can be dangerous if the player accidentally dismembers the pyramid's hardpoint, which holds the swarm rack. They would then have to counter against the distortion field's huge damage output. Having a lot of HP and healing items is the normal way. But if there are any other methods let me know.