Secrets

In most levels of Drilling Billy are secret locations that release a number of items or, in one case, activate a secret door when Billy digs there. These spots are indistinguishable from the surrounding ground; however, in easy mode, they are pointed out by a red arrow when a monster falls through two (three in normal mode) or more holes.

The location of the secrets differs depending on the difficulty.

Easy mode
There are at least 11 secret locations in the Deep Jungle in easy mode. The eighth level has two secrets.

Normal mode
There are at least 16 secret locations in the Deep Jungle in normal mode. The eighth and twelfth levels have two secrets.

Easy mode
There are at least 11 secret locations in Construction Area in easy mode.

Normal mode
There are at least 16 secret locations in Construction Area in normal mode.

Easy mode
There are at least 11 secret locations in the Dark Cave in easy mode.

Normal mode
There are at least 16 secrets in the Dark Cave in normal mode.

Easy mode
There are at least 12 secrets in Lagoon Island in easy mode.

Normal mode
There are at least 10 secrets in Lagoon Island in normal mode.

Easy mode
There are at least 14 secrets in Ancient Egypt in easy mode. The second level has two secrets.

Normal mode
There are at least 13 secrets in Ancient Egypt in normal mode. The second level has two secrets.