While I can understand why you have chosen to make some technologies locked behind finding abandoned tablets. It seems like the balance is off. Either tablets are not spawning as often as they should or too many technologies are tablet locked. Also it seems that the question mark for spawn tablets disappears when you save and exit the game making it hard at times to remember where any tablets you didn't get to yet are if you have to exit while exploring or if there are tablets you need the tier 3 grinder to get too.
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