Tons of games exist here you have to solve puzzles, but what about a game that requires you to fix something, and to know the right parts you need to find in the game you need to perform a little math? One example of this would be lets say you encounter a room you need to enter, and you see the electronic controls are blown out. You take apart the control panel and see a resistor is burnt. You know a spare parts room exists but it has dozens of resistors in it. On the controller board you notice a few values. So your options are to either try every every resistor in the spare parts room until you either find the one that works or blow something else out or find Ohm's Law I=V/R formula somewhere in the game, use the values you saw on the controller board to calculate the correct resistor, install it, and enter the room. The game would not be something math related, but it may have math elements like this here and there to attempt to repair things to advance. I mean imagine a really creepy situation where you are trying to repair a control board and hear something scary moving around the corner lol. Do you guys think math calculations have no place in a fps/horror/exploration type game?