I see so many of them around today but I am always skeptical of the scientific validity of them. I'm happy to pay a reasonable amount and I greatly value privacy. Main thing for me would be trying to improve memory.

Any recommendations are appreciated! If I need to go out and buy a DS and a copy of Brain Age, so be it.

Factorio will challenge all of your mental capabilities

It breaks me mentally but I can't stay away... I NEED THE CRACKTORIO!!