A role-playing game (aka RPG) is a game in which the participants assume the roles of fictional characters. Participants determine the actions of their characters based on their characterization, and the actions succeed or fail according to a formal system of rules and guidelines. Within the rules, players have the freedom to improvise; their choices shape the direction and outcome of the game. (from wikipedia)
This list is a showcase of all top RPG games across all gaming platforms, including a link to a full RPG game list for each platform.