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No, they only work "outside" so they don't work in the tunnel between Talos and Laurion too, because it's a tunnel

stone in the saw, confused me too for a bit

my worker's energy went to -10 and now he's useless :(

how am I supposed to get the upgrades? the image showing upgrades has a resource I can't figure out how to get, am I supposed to get 1k fibers?

EDIT: i got 10K energy (Don't know if you need this much) and unlocked upgrade for portal