litrpg
A scifi/fantasy subgenre where the main character has game mechanics like in an RPG. Attributes, skills, levels, and quests are all very common. Training montages are accompanied with skill and attribute level ups, and quests appear as floating boxes. The system may be part of the world itself, with every character using it, or it is could be a unique cheat system of the main character.
The Wandering Inn is a popular LitRPG web serial.