4X games are a subgenre of strategy video games that focus on four key gameplay elements: exploration, expansion, exploitation, and extermination. Players typically control a civilization or faction, exploring a map, gathering resources, and expanding their territory. The goal is to build a powerful empire while managing various aspects like economy, technology, and diplomacy. These games often feature turn-based mechanics, allowing players to make strategic decisions at their own pace. Popular examples of 4X games include Civilization, Master of Orion, and Endless Legend. Each game offers unique mechanics and settings, but they all share the core principles of the 4X genre.