This page details development materials of Black Out.
Various assets related to the game can be found at the following paths:
The file modification dates may give clues as to when the game was developed. The oldest files are dated 1991-11-11 and 1991-11-14, while the most recent files are dated 1992-08-05 and 1992-02-21. A bulk of the files are dated around December 1991 to January 1992.
We get to see a few unused objects in action, such as the Hammer, Shovel, and hand, as well as the unused angel creature. The sleeper was also meant to do more actions: falling asleep, rolling (possibly when tumbling down hills), and falling through thin terrain. There is also an alternate design for the sleeper, which looks not more 3D and realistic (and wouldn't entirely be out-of-place among the Yoshi's Island prologue cutscene graphics). Another sleeper design, with an orange-yellow cap, is located in the z-sword directory.
NOTE: Unless the .COL file is specified, most gifs were made using the sleeper.COL palette.
bg1-meter.SCR + bg1-meter.CGX + sleeper.COL
Interestingly, this file shows two more unused HUD icons:
NOTE: Some images have been given blue backgrounds for better visibility.
A 2bpp file containing even more unused HUD icons.
4bpp versions of the unused HUD icons.
Younger-looking versions of the sleeper.
These are most likely related to the unused rope.
An alternate version of the pachinko ball.
Various frames for splash effects.
This looks like a placeholder of sorts.
Some acorns which could possibly be knocked down from above.
A fruit which looks similar to the berries from Super Mario World.
An older-looking design for the Bomb item.
A dangerous sphere.
Some frames of a water animation.
Alternate designs for whirlpools.
Some variations of grass tiles.
Another variation of the grass tiles, this time with fewer spots.
A strange sphere within a block, found among the underground tiles.