Dungeons & Dragons 4th Edition
Core RulebooksCore Mechanic
Roll d20 + modifier against a target DC or defense (AC, Fortitude, Reflex, or Will). Every class has powers organized as At-Will (usable any turn), Encounter (once per short rest), and Daily (once per extended rest), plus Utility powers. Healing surges are a daily hit point pool that characters spend during short rests or when healed in combat. Combat assumes a square grid with miniatures — positioning, marks, opportunity attacks, and forced movement are central. Skill challenges resolve non-combat encounters by accumulating a target number of successes before three failures.
Best For
Groups who prioritize tactical grid combat with miniatures, want every class to feel mechanically distinct through roles (Defender, Striker, Leader, Controller), and enjoy heavy character optimization across 30 levels of structured advancement.
Highlights
Standardized math across all 30 levels means encounter design and DC setting follow consistent formulas. Four combat roles (Defender, Striker, Leader, Controller) give every class a defined team function. Skill challenges provide a structured framework for resolving non-combat encounters. The Essentials line (2010) offers simplified classes with fewer per-level choices as an alternative entry point.
Considerations
Miniatures and a battle grid are effectively required; combat does not function in theater of the mind. High-level combat can run long due to the volume of conditions, statuses, and triggered actions to track per turn. The At-Will/Encounter/Daily power structure is a significant departure from earlier editions and from 5e, which can frustrate players expecting a traditional D&D feel.