Book Learner

Difficulty: Medium-Hard

This achievement is not too hard to get. To get this, all you have to do is to beat Adventure Mode, buy all of the Upgrade Plants and the Imitater from Crazy Dave's Twiddydinkies, and also encounter the Zombie Yeti by seeing him in Level 4-10 when you replay Adventure Mode. It's just like a combination of the Achievements "Morticulturalist" and "Zombologist" or "Cryptozombologist" from the other versions. This achievement will not count until you find Zombie Yeti.

Note: You might need to do some Gold Farming to buy Upgrades and the Imitater.