How do you create a video game prototype?

I assume a prototype is the working, basic version of the game. The white board is pre prototype. The sketching, rough draft of an idea before you create the prototype. You can use a chalkboard, napkins, or anything.
 

EvanSki

King of Raccoons
work on your core mechanics, think of it like a skeleton, start with the bone then FLESH it out
 
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