in addition to fighting fleshy organics, a series of enemies based on metal would be also amazing, and the ability to salvage said enemies when killed to make next-gen workbench modules to make all the cool stuff we aspire to make!
Something like Protos in Starcraft?
And I was thinking more like sentinels in no mans sky lol
How about a machine race that is a playable race?
after you meet several prerequisites, yes, you have to build the first one tho XD