Powered by the Apocalypse

Powered by the Apocalypse (PbtA) is a tabletop role playing game design framework developed by Meguey Baker and Vincent Baker for the 2010 game "Apocalypse World" and later used for "Dungeon World", "Monsterhearts" and numerous other RPGs.
Mechanics.
Powered by the Apocalypse games are centered on resolving what characters do as Moves. Characters have access to a default selection of moves based on the expectations of the game setting. In the fantasy game "Dungeon World", characters have access to a hack and slash move, as combat is central to the dungeoneering experience. Alternatively, "Apocalypse World" has a "seize by force" move, as the game assumes a setting where collecting scarce resources is part of the game-play experience. "Apocalypse World", "Dungeon World", and most other PbtA games are class-based. Character classes have access to a number of class-specific moves.
Moves are resolved by rolling two six-sided dice and adding the relevant modifier, should modifiers be a mechanic in the game. Success levels fall on a scale of total success, partial success, or failure—referred to as a "miss" in the system.
List of games.
Because of the simplicity and the flexibility of the Powered by the Apocalypse engine, and Vincent Baker's encouragement of publishing hacks, there are at least four dozen fan-made hacks that have reached the point of public playtesting. This list only covers the ones actually published.
A list of Powered by the Apocalypse games who have obtained permission to use the mark is available on the Apocalypse World website.
Reception and analysis.
In addition to other awards won, "Apocalypse World" won the 2010 Indie RPG Award for "Most Innovative Game" and "Dungeon World" won the 2013 ENnie award for "Best Rules".
Multiple reviews discuss how the system's reliance on moves provides a streamlined focus on the fiction. "Bitch" magazine has commented on the messy interconnected relationships the system produces.