The pattern of the Math Problem killer is consistent;
1) Abduct a young woman,
2) Kill her social circle and family,
3) Torture her,
4) Place her in a locked metal box in a dungeon,
5) Contact law enforcement and tell them the hostage location,
6) Allow one agent to enter facility
As you play through the dungeons of The Math Problem Killer, you will find that he populates his dungeons with victims. All of these victims are connected to the hostage in some way or another. They may be work colleagues, neighbors, roommates, family members, etc.
The above video is an example of the killer murdering the friends of the hostage. Although it is not explained in the video, Charlie and Christina Smith would be close friends of the hostage. One of the sadistic attributes of the killer, is that he brutally murders everyone that is close to the kidnap victim, so that even if the hostage is rescued by the agent (you the player), the hostage is still psychologically destroyed by the experience. This element of the psychological warfare the killer employs, becomes a theme throughout the game.
In the main game, you would walk around the room, and collect multiple recordings. Each recording would go into grisly detail about how the killer stalked and murdered the friends and relatives of the hostage.
One element that is not common in the game that is present in the video is an actual equation written on the wall. That was made for the video to help explain the mechanics of math problems and how the facts fit into an equation. There are only a handful of instances throughout the game where an actual equation is written on the wall. In most other instances, you will need 1) to find the recordings, 2) listen to the facts, 3) identify the important facts, and 4) craft the equation yourself.
It is important to remember, that the Math Problem Killer is a game that places a high value on critical thinking. That is about it for now.
Thanks for reading and good Luck Special Agents!