Final answer:
A MUD is considered a video game because it involves multiplayer interaction and gameplay.
Step-by-step explanation:
A MUD, or multiuser dimension, is considered a video game because it involves multiplayer interaction and gameplay. In a MUD, players can interact with each other in a virtual world, complete quests together, and engage in various activities. While MUDs may not have realistic 3D graphics or include microtransactions, they still provide an immersive gaming experience through the social and interactive elements.