Black Eggs are items which have appeared in several of the Cube Escape and Rusty Lake games.
Cube Escape: SeasonsEdit
During Spring, when the player feeds the bird seed to Harvey, she will lay a black egg. The egg can then be cooked in a pan and placed in an egg cup. Cracking the egg with a spoon releases black butterflies. Once it is fully opened, a beam of light will shoot from the egg and reveal a black cube.
Cube Escape: Harvey's BoxEdit
Inside the box in the first section of the game there is a black speckled egg, lying next to a fish. After the player experiences a vision through a durian fruit and the box arrives at the Lake, the egg is replaced, possibly hatching, and a miniature version of Mr. Crow appears. The player must then adjust his pose in order to complete a puzzle.
Cube Escape: Case 23Edit
In the living room of the Woman, there is a set of Russian nesting dolls. If the player follows the sequence of items into the dolls, the Woman doll opens to give a black egg. The egg can then be placed into the Harvey doll, which in turn gives the player a key.
Back at Dale's office, the player can unscrew the grate off of the vent to get to a cat sitting inside. After shaving off Dale's beard in the mirror, attempting to flush the hair down the sink causes it to clump together and form a baby crow. The crow is fed to the cat, which will eventually make the cat leave and leave a black egg. When the code 746 is logged into the TV, the Woman appears on the screen. She reaches her arm up, and a hand comes through the TV. If she is given the black egg, she will turn it into a white cube before handing it back.
Cube Escape: TheatreEdit
The egg is featured as part of the third play, "The Fish and the Parrot". After adjusting a maze of pipes and feeding Harvey seeds from a pink flower, she will lay a black egg. The egg must then be passed through the same series of pipes to reach a frying pan, where it will break open to reveal a worm. The play ends when the fish is fed the worm.
Rusty Lake: RootsEdit
When James moves into his new house in 1860, he needs to find three diamonds to unlock the front door. After knocking down a bird's nest from the roof, the player will see a single black egg inside. Clicking on the egg hatches a baby crow that flies away after being fed a worm, leaving behind a green diamond.
In the alchemist laboratory underneath the Vanderboom house, Aldous and William are trying to create the Elixir of Life. Mixing together chalk and dust creates a black egg which, when combined with a glass bottle, gives the complete Elixir.