role playing games are when the player takes on the role of a imaginary character who engages in quests and adventures across there world completing them in what order they like, and making choices about how they approach and how that will affect the world and the rest of there time on the game. role playing games typically allow you to create your own character giving the player to create there vision of there hero. a example of a RPG is south park the stick of truth, this game allows you to create your character and design it how you want and throughout the game you can unlock more customisation options for you character.
in most RPG there are normally classes to differentiate your experiences of the game. with south park being over the top they had four classes in there stick of truth game they had fighter- a epic fighter that can kick major ass, mage- a wizard but not as cool, thief- a stealthy class that requires intense skill and sneaky, and the one that made most people laugh was the fourth option was a jew and the description of this was a jew huh? i guess we will never be friends. these will all tell you what ability and how your experience will go.

but as said by techopedia that defines what a rpg is, they said Defining RPGs is very challenging due to the range of hybrid genres that have RPG elements. Traditional role-playing video games shared three basic elements:
- Levels or character statistics that could be improved over the course of the game
- A menu-based combat system
- A central quest that runs throughout the game as a storyline
Modern and hybrid RPGs do not necessarily have all of these elements, but usually feature one or two in combination with elements from another genre. once you have completed a mission in south park you unlock more characters ingame to use against enemies and xp so you can become better and more powerful in game.
typically games like the witcher 3 have skill trees to make you character more powerful and help you to progress through the game.

you normally have a select number of inventory slots to carry items like materials, health potions, weapons and key quest items

emergent game play in role playing games can be where your actions in game can determine how you experience of the game will go, like how it will affect the world around you and how the story line of that game will unfold