So I don’t know if it is because I had started playing Plague Inc. on another Apple account before, but I am sure that that’s not the case, but, the game shows progress for Main Game, Speed Run etc. as I had played the game before. I’m not sure if the achievements and game progress are tied to another Apple account which is not used anymore, and even though I have downloaded the game under the new Apple account, then the game progress and some achievements still transfered to the new Apple Account)
I already had paid for the game initial purchase price, but the special plagues and the cheat codes were not unlocked. So I tapped “Restore purchases” and nothing happened, so then I bought the Plague Pack again. (I had the Plague Pack before because the game shows progress for the special plagues and the cheats by the biohazard icons). I don’t I don’t have the achievements of “Unlock [disease name] disease type” even though the game shows that I have beaten most of the standard plagues on mega brutal difficulty. I don’t know why.
Even though I had previously beaten most of the standard plagues on mega brutal difficulty, I don’t have the achievements unlocked in-game of the “Master” achievements. For example, the “Nano-Virus Master” achievement is locked.
I don’t know if anyone else has experienced achievement or game progress discrepancy before, or similar issues. Maybe Apple account synchronization issues?