I am working on a solo rpg that uses many 6 sided dice because they are easy to obtain for most people, a pencil and paper.
The rules will be one page (double sided). It is kind of based on "Wall-e" and "The Brave Little Toaster".
Here is the background story; A nerdy, kinda lazy, sort of genius tech decides to make a little robot to help him around his studio apartment. You are that little robot and must accomplish the task(s) he sets before you.
The game; 6d6 is the robots name (the tech is into Star Wars). He has 6 'batteries' that have six charges each. Two batteries are used for Movement (i.e. getting to a certain place), two batteries are used for Attack (performing a task) and two batteries are used for Defense (protecting operating systems or work done). It is a MAD system (Movement, Attack, Defense) with 12 points assigned to each. The batteries can be moved at the cost of one point. For example, 6d6 after working a while has Movement:2, Attack:7 and Defense:12. He decides to move a battery from Defense to movement. So he now has Movement:7 (one point was lost in the move), Attack:7 and Defense:6.