To use their lines you need to outsource the production of your CPUs. You can do that by selecting their lithography when creating a new CPU. Also, make sure the "Licensed" toggle is enabled
CoffeeHeaven
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I don't have a set date for the next update yet, but there will be a new beta on our Discord server in about 10 days
I'm glad you're enjoying it!
But yeah, Very Hard requires a lot of min-maxing and luck. One possible strategy is to make a good enough chip for Industries, research 76mm Wafer as soon as possible, build one 51mm production line, and hope that you can sign a console or computer contract (since they ask for a small number of chips)
There's a bit of luck involved, since you're competing with other companies for the contracts. You can try sending offers to as many contracts as possible, that way you have a pretty good chance of signing at least one.
Also, make sure to enable the "cancel offers" automation, to avoid signing contracts that exceed your production capacity
