The Lost Mind of Dr. Brain

The Lost Mind of Dr. Brain (1994) is the third game in the Dr. Brain edutainment series by Sierra and Bright Star Technologies.The game gives players a series of 10 brain-testing minigames that wouldn't feel out-of-place in a more thorough, fleshed-out version of Brain Age.

Original title
According to a few scattered references within the game files, The Lost Mind of Dr. Brain was originally titled "Dr. Brain 3: Brain Damage."

Prototype games
DRBRAIN3.exe refers to two incomplete games: "Hydra" and "Rewire." No other information is still in the game about them apart from their names. The corresponding files for the two games are missing from the final project, replaced with Train of Thought and the Neural Maze. DRBRAIN3.exe also mentions editors for Hydra and Rewire, which suggests they were removed while individual levels were still being built.

The developer, Ward Makielski, says that these were prototypes of games that later evolved into Neural maze.

Also, most references to the "3D Construction" section list it as "CAD Game" (which makes sense given its subject matter).

Snarky comments
The resource file for the main DRBRAIN3.exe file only contains two strings: Smug of them...
 * "Silly Comment:"
 * "Why are you looking at the resources in this file?"