According to various sources, Cookie Clicker has many achievements that range from difficult to borderline unfair. Here are some of the hardest achievements in Cookie Clicker:
- Septcentennial: This achievement requires you to have 700 of everything, and only has a one percent completion rate.
- Speeds The Name Of The Game: This achievement requires you to have a total CPS of 100 septendecillion, which is a staggering amount of cookies being produced. It has a 1.4 percent completion rate.
- Black Cats Paw: This achievement requires you to click 7,777 golden cookies, which takes a painfully long time.
- Endless Cycle: This achievement requires you to ascend 1000 times, and is by far the most labor-intensive achievement in the game, needing several hours of grinding ascensions, over possibly several days.
- Secrets of the Cookieverse: This achievement unlocks once you reach the 28th centennial and is the hardest achievement you can get from centennials.
Other difficult achievements include:
- True Neverclick: This achievement requires you to reach 1 million cookies without clicking the big cookie once.
- All Upgrades: This achievement requires you to purchase every upgrade in the game.
- Bicentennial and Tricentennial: These achievements require you to have 200 and 300 of everything, respectively.
Its worth noting that some of these achievements are Shadow Achievements that are not required for 100% Completion, unless youre playing on Steam, where they are required.