Everyone has tried or played tabletop RPG's at one time or another. Dungeons And Dragons, of course, is the granddaddy of them all. I tried the Pokemon Jr. one (I was better off as a GM than a player in that one).
There's an RPG called Savage Worlds that is what AD&D used to be before they changed the D20 license.
And someone has done something...interesting with it.
If you like RPG's and want to try something different, this fellow has created a sourcebook for The Savage Worlds Of My Little Pony -- Friendship Is Magic. It's 66 pages and apparently works just fine within the Savage Worlds game framework. Available as a free .pdf.