Experience point

Lore & Background

The term 'experience point' was introduced by Gary Gygax and Dave Arneson in the creation of Dungeons & Dragons. Arneson introduced a level-up system while playing a modification of Chainmail, for which Gygax was a co-author. Dungeons & Dragons needed an abbreviation for 'experience point', but EP was already in use for 'electrum pieces', part of the currency system. One of TSR's first hires, Lawrence Schick, suggested the abbreviation XP, to help Gygax complete the game manuals before release.

Experience points are used in various progression systems. In level-based progression, such as games derived from Dungeons & Dragons, accumulation of XP increases a character's level, which represents overall skill and experience. In activity-based progression, used in games like Traveller and Call of Cthulhu, character progression is based on increasing individual statistics through exercised use. Free-form advancement, used in GURPS and World of Darkness, allows players to allocate points to specific abilities. Cash-in advancement systems, as in Final Fantasy XIII and Warhammer Fantasy Roleplay, use XP to purchase advancements, with spent points erased from the character record.

In video games, most early role-playing video games derived from Dungeons & Dragons use a level-based experience system. Some games use 'character levels' where higher-level characters hold absolute advantage, while others use 'skill levels' for specific aptitudes. Perks, special bonuses unlocked through experience points, were first used in the 1997 video game Fallout. Remorting, also known as rebirth or new game plus, allows a character reaching a specified level limit to start over with advantages. Grinding refers to repeating activities for experience points, and power-leveling uses a stronger player to level a character more quickly.

Reader's Guide

Experience points are a foundational mechanic in role-playing games, originating with Dungeons & Dragons and influencing countless tabletop and video games. They provide a quantifiable measure of character growth, allowing players to see tangible progress as they overcome challenges. The introduction of XP by Gygax and Arneson, and the abbreviation by Schick, solved a practical problem in game manual production while creating a standard that persists today.

The significance of experience points lies in their versatility across different progression systems. Level-based systems offer clear milestones, while free-form and cash-in systems give players more control over character development. This flexibility has allowed XP to adapt to various game genres, from traditional RPGs to action games and first-person shooters that incorporate perks. The concept also drives player behavior, encouraging engagement with content and sometimes leading to grinding or power-leveling.

Legacy-wise, experience points have become a universal shorthand for progression in gaming. They enable game designers to structure difficulty curves, reward exploration, and provide a sense of accomplishment. The term 'XP' is now widely recognized beyond tabletop and video games, appearing in educational and workplace gamification. Despite variations in implementation, the core idea of earning points to improve abilities remains a staple of interactive entertainment.

Did You Know?

• The abbreviation XP was suggested by Lawrence Schick because EP was already used for 'electrum pieces' in Dungeons & Dragons.
• The first video game to use the term 'perks' for special bonuses unlocked through experience points was Fallout in 1997.
• In some games, such as RuneScape, there is a level cap of 120, requiring 104,273,167 experience points to reach.
• Remorting, also known as rebirth or new game plus, allows a character to start over after reaching a specified level limit, gaining previously unavailable advantages.

Origins and the Birth of a Term

The concept of the experience point traces back to the collaborative worldbuilding of Gary Gygax and Dave Arneson during the creation of Dungeons & Dragons. Arneson had been experimenting with a level-up mechanic while playing a modified version of Chainmail, a game for which Gygax served as co-author. When the two set out to formalize their system, they hit a practical naming problem: the natural abbreviation "EP" was already claimed by the game's currency system, where it stood for electrum pieces. The solution came from an unlikely source. Lawrence Schick, one of the earliest employees at TSR, proposed the two-letter shorthand "XP" as a workaround. This suggestion was made with the practical goal of helping Gygax finish the game manuals before their scheduled release. What began as a simple typographical convenience became one of the most recognizable abbreviations in gaming culture, a tiny two-letter code that would come to represent the fundamental engine of character growth across hundreds of tabletop and digital role-playing games for decades to follow.

The Engine of Growth: Leveling and Scaling

In most role-playing systems, a character begins as a relatively untrained and vulnerable figure. The experience point serves as the fuel that transforms that fragile starting point into a capable adventurer. When a player accumulates enough XP through completing objectives, defeating opponents, or demonstrating effective role-playing, the character undergoes a "level up"—a discrete jump to the next tier of development. This milestone typically boosts core statistics like maximum health, magical capacity, and physical strength, and may unlock entirely new abilities or sharpen existing ones. It can also open doors to more dangerous regions and more powerful equipment. Crucially, the system is designed to create a feedback loop: as challenges grow harder, the XP reward for overcoming them increases, yet the threshold for the next level also rises. Some games keep the per-level requirement fixed but instead reduce the XP earned from the same task as the character grows stronger. Either way, the design nudges the player toward accepting greater risks that match their improved capabilities.

Many Roads to Mastery: Advancement Philosophies

Not every role-playing game treats experience points the same way. In systems descended from Dungeons & Dragons, XP accumulates toward discrete levels, and some editions even let players "burn" experience to craft magical items or unlock prestige classes. At the opposite end, games like GURPS, the Hero System, and the World of Darkness series adopt a free-form model: each skill or attribute carries a point cost, and the player decides exactly where to spend. Raising archery by one notch might cost two points, while learning a new spell could demand twenty. Activity-based systems, found in titles like Traveller, Call of Cthulhu, Final Fantasy II, The Elder Scrolls, and the SaGa and Grandia series, take yet another approach—skills simply grow through repeated use rather than through a pooled currency. A fourth model, the cash-in system seen in Final Fantasy XIII and Warhammer Fantasy Roleplay, lets players purchase specific class levels, feats, or attribute boosts, after which those points are permanently erased from the character sheet. Many modern games blend elements from several of these philosophies into hybrid frameworks.

Digital Gatekeeping: XP in Video Games

Because so many early role-playing video games drew directly from Dungeons & Dragons, the level-based XP system became the default architecture for digital character progression. In these games, a minimum level often acts as a hard gate: a player cannot wield a particular weapon, enter a restricted zone, or earn a non-player character's respect until the threshold is met. Designers then split into two broad camps. Some use "character levels," where a higher number confers an absolute statistical advantage and detailed stat management is minimized. Others prefer "skill levels," measuring proficiency in specific aptitudes like weapon handling, spell-casting, or stealth, which grants players far greater freedom to shape their character's identity. To prevent infinite scaling, many titles impose a level cap. RuneScape, for instance, caps overall level at 120—requiring over 104 million experience points—and limits any single skill to 200 million XP. Some games even use dynamic caps that shift over time based on the average player's progress.