Playlist: • Dr. Brain, Castle of Time for another walkthrough! This time I'll be playing The Castle of Dr. Brain. This is a game made by Sierra Entertainment in 1991. Your task is to work your way through Dr. Brain's castle, solving every math, science, (and whatever else) problem along the way. If you manage to get through his castle, he might hire you as his assistant. To keep things simple, I'll be playing through this game on the Novice level. If you're wondering what each of the codes refer to, look here: Last note, gah, so many puns in this game!