Monster (computer gaming)

Lore & Background

The term 'monster' in computer gaming is closely tied to the concept of 'mob,' which is an abbreviation of 'mobile object.' Richard Bartle used 'mobile object' for self-mobile entities in MUD1. Later, DikuMUD source code used 'mobile' to refer to a generic NPC, shortened to 'mob' in identifiers. DikuMUD heavily influenced EverQuest, and the term carried into MMORPGs from MUD usage. The term is an abbreviation, not an acronym.

Reader's Guide

Monsters, or mobs, are a core element of many video games, especially role-playing games and massively multiplayer online role-playing games (MMORPGs). They serve as obstacles and sources of rewards: defeating mobs may be required to gather experience points, money, items, or to complete quests. Combat between player characters (PCs) and mobs is called player versus environment (PvE). Mobs may also attack PCs aggressively. In some games, monster versus monster (MvM) battles occur. Most mobs are capable of no complex behaviors beyond attacking or moving around. 'Named mobs' are distinguished by having a proper name rather than being referred to by a general type (e.g., 'a goblin'). The term 'monster' is not used in the source article for NPCs that engage in dialog, sell items, or cannot be attacked; those are excluded from the 'mob' category in most modern graphical games.

Did You Know?

• The term 'mob' is an abbreviation of 'mobile object,' not an acronym.
• Even early MUDs featured mobs with complex scripts, social behaviors, and quest interactions, not just simple attack-and-move routines.

Core Gameplay Mechanics & Command Grammar

Within the text-based worlds of MUDs, a player's survival and progression hinge on a suite of numerical and command-driven mechanics. A character's vitality is tracked through hit points, a numeric value that, once depleted, results in the character's death. Similarly, magical capacity is quantified as mana, representing the energy available for spellcasting. Movement is also a finite resource, dictating how far a character can travel in a single step. Players manage their gear through equip (active items in use) and inv (carried possessions or inventory). Navigation relies on exits, the listed options for leaving any given area. The overall numerical profile of a character—encompassing hit points, experience progression, and other metrics—is collectively referred to as stats or score. When a player intends to perform an action but cannot recall the correct command syntax, the situation is colloquially called a guess-the-verb. Interacting incorrectly with the game system, such as issuing malformed commands, is known as maving. Together, these mechanics form the foundational grammar through which players engage with the virtual world.

Social Identity & Roleplay Culture

MUD communities developed a rich vocabulary for the social and roleplay dimensions of play. Players who adopt a persona are expected to behave IC, meaning in-character, while OOC refers to breaking that assumed role. The culture also embraced anthropomorphic animal characters, known as furry, and even facilitated cybersex through MUD commands or text, a practice called tinysex. Veteran players who have been in the world for a long time earn the title dino, while newcomers are simply newbies. Aggressive player-versus-player combat is encapsulated in the term PK, short for player killer, and can be used both as a noun and a verb (PKing). A designated haven provides a safe zone where players cannot be killed, offering respite from the constant threat of combat. The consider command lets a player assess an enemy's relative power before engaging. Meanwhile, spamming—posting excessive text that scrolls the screen—remains a social faux pas. Bots, characters controlled by computer programs, also populate these worlds, blurring the line between human and automated presence.

Hierarchy of Authority & World Governance

Authority within a MUD is stratified across several overlapping titles. The highest tier—god, admin, arch, imp, or implementer—denotes the MUD's administrator or owner, the ultimate authority over the virtual world. Below them sit wizards (also called immorts or immortals), players who hold special rights such as the ability to create new MUD content. Wizards typically fall into three categories: MUD administrators themselves, players who completed the game and earned the title through the wiz process, or players appointed by an administrator to assist in operation. The act of completing the game and being promoted to wizard status is called wiz. Conversely, remort refers to the deliberate undoing of one's immortal status, a choice that strips a player of elevated privileges. A log serves as a record of activity within the MUD instance, providing transparency and accountability. The mob or mobile represents an enemy monster, a creature that exists within the game world as an adversary to players. This layered hierarchy of power—from god to wizard to ordinary player—mirrors the governance structures of the communities these worlds sustain.

Virtual Economies & Persistent-World Phenomena

Beyond individual gameplay, MUDs generated distinctive economic and communal phenomena. Mudflation describes a virtual economy problem in which endgame players accumulate vast wealth in currency, driving down the cost of rare items and destabilizing the in-game market. To preserve their possessions between play sessions in a persistent world, players must pay rent, a virtual currency fee that keeps their inventory safe. Multi-boxing (or dual-boxing) allows a player to control multiple characters simultaneously, amplifying their economic and strategic influence. The community also developed shorthand for common frustrations: a newbie is a new or inexperienced player, while a dino is a long-standing veteran. The log, a record of activity in the MUD instance, serves as both a tool for administrators and a historical archive. Spamming—posting excessive text that scrolls the screen—remains one of the most cited social irritants. Together, these terms paint a picture of persistent online worlds where economies, hierarchies, and social norms evolve organically from player interaction, creating ecosystems as complex as any physical community.