Zombologist is an achievement that can be earned in the iOS, Steam, and PlayStation Vita versions of Plants vs. Zombies. It is worth 25 points on Game Center. This achievement is earned by finding the Zombie Yeti. It is the equivalent of the Cryptozombologist achievement available through the Steam Game of The Year edition. To find the Zombie Yeti, the player must reach Level 4-10 on their second Adventure Mode playthrough. He or she will earn this achievement, even if he or she does not kill it.