What Is an XP Curve?
An XP curve is the function that describes how much experience a player needs to reach each level — whether that requirement stays flat, grows steadily, or accelerates. The shape of the curve, not just the raw numbers, determines whether leveling feels steady, rewarding, or like a grind.
Definition
Most games use one of three basic shapes: linear (a fixed amount of XP added per level, for a steady pace), exponential (each level requires a multiple more than the last, for a fast start and a long grindy tail), or logarithmic (requirements grow but the growth itself slows down, for quick early progress that levels off).
Example
Illustrative example A game with an exponential curve and a growth rate of 1.15 requires roughly 15% more XP for each successive level. Level 2 might need 100 XP, level 11 might need over 350 — the same shape that gives a fast, rewarding early game also produces a long, deliberately grindy tail for dedicated players.
Why It Matters
A curve picked without checking it against content — how often new zones, gear, or story beats unlock — tends to produce levels that unlock nothing, or unlocks that arrive mid-level. The curve should be a consequence of that content cadence, not chosen first and fit to content later.