X4: Foundations is a deep single-player space simulation game that combines large-scale empire management with immersive first-person ship control, allowing players to build and influence a vast, persistently simulated universe. Available exclusively on PC and supporting multiple control schemes, the game has been continuously developed over seven years, offering both sandbox gameplay and optional story-driven DLCs.
X4: Foundations is a comprehensive space simulation game that offers players a vast, persistently simulated universe to explore and interact with. Players start with a single ship, which they can control in first person, walking around inside it, piloting it, or moving around space stations. The gameplay revolves around activities such as trading, fighting, and mining to earn money. As players progress, they can expand their fleet, issuing commands to other ships to automate tasks, effectively building a space empire. The game uniquely allows switching between a large-scale map interface for empire management and an immersive first-person perspective for direct control.
The game is entirely single-player, with the entire universe simulation running locally on the player’s machine. This design choice enables faster progression and significant economic impact within the game world, something that multiplayer games typically restrict. Players can grow from a small pilot into a major power capable of influencing entire factions. While the base game has a minimal storyline, various downloadable content (DLCs) add campaigns and new content, allowing players to choose how and when to engage with the narrative or simply enjoy the sandbox experience.
X4: Foundations is part of a long-running series, being the fourth major installment following X: Beyond the Frontier and its sequels. Although the game incorporates many elements typical of 4X strategy games—exploration, expansion, exploitation, and extermination—it stands out by blending these with first-person gameplay. This combination caters to different player preferences, allowing for both large-scale empire management and hands-on ship piloting within the same universe.
The game supports multiple control schemes, including flight sticks, mouse and keyboard, and gamepads, with customizable configurations to suit player preferences. While flight sticks are popular for piloting, the mouse is often preferred for navigating the map interface and issuing commands. This flexibility allows players to tailor their gameplay experience to their preferred style, whether focused on immersive control or strategic management.
X4: Foundations is available exclusively on PC due to its high memory requirements and large save files that store the entire universe state. It supports native Linux versions and can be played on the Steam Deck, where the user interface scales to accommodate the smaller screen. The base game was originally released seven years ago and is currently in version 9.0, with ongoing public beta testing for new updates. This longevity and continuous development reflect the game’s depth and the developers’ commitment to expanding its universe.