First of all I had a major nuclear meltdown on one of my nuclear reactors, (there was an explosion) yet the achievement didin't trigger. Is this a known issue?
I'm also doing a continuous game where I have finally settled my city and things are going well, so I'm now focusing on the ark upgrades. I have 3 slots for the offshore wind park since I play with Eco's and those 3 upgrades render them very efficient with only around 7 of maintenance for 30 energy generation and 0 radius so I can build them all next to each other. I also have two level 1 upgrades for -8% maintenance for all buildings and another one -10% maintenance for all eco buildings. I'm afraid I might be missing out a major ark upgrade or something that for example is only available on trenchcoat. The ones you can create on your academy are generally less useful than the ones you can get from NPC's. Is there a list somewhere with all the ark upgrades or do you know one that is useful for reducing maintenance costs? I have no idea if the low wage regulations has some variant for level 2 and 3 upgrades. Any help would be nice, thank you!