An Apple is a red-yellow fruit that has only appeared in Cube Escape: The Lake.
Cube Escape: The Lake Edit
If the player uses a shrimp head as bait, they will pull out a body, which later reveals itself to be a Corrupted Soul. If the corpse is cut with a knife, they player can pull an apple out of its back. When the apple is placed onto the tree that grows from a fish, along with a gem, a coin, a shell and an eye, it will create a pentagram that summons the Corrupted Soul again.
- As of Cube Escape: The Cave, the apple is the only one of the five items of the pentagram to not make a reappearance in the Rusty Lake series.