Down the Hole! was an achievement that was obtainable in an older iPad version of Plants vs. Zombies. In an iPad update, it was replaced by Peking Express, but it kept its older icon. To unlock it, the player had to simply go to the achievements menu and scroll down. They would have seen Chinese zombies at the end. The player could get this achievement even before they started Adventure Mode.
- The Chinese character in the icon of the achievement is "爱" (pinyin: ài), which means "love."
- This achievement's name and method of obtainment is probably based on the myth of being able to get to China if a hole was dug through the earth.
- While going down the hole, the player can also see lots of other references to PopCap Games.