Ahriman
Tyrant
There is a difference between the Ixian Weaponry *resource* (which requires offworld trade) and the Ixian weaponry *tech* (which Ix starts with).
These are used to distinguish between requirements for the 4 Mech units. All 4 require the resource, but two of them also require the tech, and so are limited to Ix faction only (whereas the 2 that do not require the tech are buildable by other factions if Ix trades the resource to them).
The Crawler is too powerful to be available just at chemical explosives by itself, hence it also needing offworld trade.
I can see room for confusion between the resource and the tech, I think we should rename one of the resource to "Ixian technology", or the tech to "Ixian Ingenuity".
These are used to distinguish between requirements for the 4 Mech units. All 4 require the resource, but two of them also require the tech, and so are limited to Ix faction only (whereas the 2 that do not require the tech are buildable by other factions if Ix trades the resource to them).
The Crawler is too powerful to be available just at chemical explosives by itself, hence it also needing offworld trade.
I can see room for confusion between the resource and the tech, I think we should rename one of the resource to "Ixian technology", or the tech to "Ixian Ingenuity".