Stellaris is a 4X grand strategy video game developed by Paradox Development Studio and published by Paradox Interactive. Players take control of an interstellar civilization on the galactic stage and are tasked with exploring, colonising, and managing their region of the galaxy, encountering other civilizations that they can then engage in diplomacy, trade, or warfare with. A large part of the game involves dealing with both scripted and emergent events, through which the player might gain useful bonuses and profits, or vice versa, lose their power and strengthen rival civilizations. It was released worldwide for Windows, macOS, and Linux on May 9, 2016, and for PlayStation 4 and Xbox One as Stellaris: Console Edition on February 26, 2019.
Contents
Gameplay
Stellaris is a real-time strategy game with 4X and grand strategy elements, taking place on a map of a procedurally generated galaxy with individual star systems acting as two-dimensional tiles. Each star has its own star class (like B, A or F) and own planets of different sizes and types (for example gas giants or rocky planets of very high or low surface temperatures) orbiting around, that can be divided into habitable and not habitable ones; all planets have certain resources on them and can be exploited by the stellar empire that owns the system. Star systems can only be traversed via a web of faster-than-light routes called hyperlanes.
Players take the role of a single civilisation, capable of FTL travel, referred to as an empire, with the goal of exploring and claiming systems, colonising habitable planets, and expanding their economy to outcompete rival civilisations, encountered through events of first contact. The relative power of empires is evaluated on three factors – military strength, technological progress and economic power – allowing players to either specialise in a single area or maintain a balanced approach. Military strength is influenced by the strength of the starship fleet an empire possesses, and can be used to engage in wars against other empires. Technological progress is defined by the amount and rarity of technologies an empire has researched, with each technology providing some minor bonuses or unlocking unique major changes. Economic power depends on the amount of resources an empire produces, that can be used to trade with other civilisations or improve the quality of life of the population.
The empire that collects the largest amount of in-game score, that depends on its power, political influence and several other factors, wins the game when it reaches its end date. Habitable planets hold populations of an empire's citizens, where each citizen is assigned a certain job, representing a working, specialist or elite class, with each job consuming and producing some in-game resources. Jobs are provided by buildings existing on the planet, where each building also gives certain bonuses by itself and is bound to a certain type of 'district' like city district, industrial district, energy district or agricultural district.
A large part of main gameplay of Stellaris is determined by the design of the player's empire, which affects both visual look and in-game mechanics. The player is offered to either select from developer-made pre-set empires or create their own; each empire has a set of unique traits like origin, representing the pre-FTL history of their civilisation, ethics, representing the core philosophy of their empire, civics, representing the internal structure of their government and society, or head of state together with the type of government (like authoritarian, democratic or fictional "Hive mind" or "Megacorporation" types). Ethics are chosen from a total of eight options along four mutually exclusive axes, allowing the player to also choose between fanatical and moderate variants of each.
Players also control leaders - in-game characters that can occupy a certain position or role, like managing research operations, governing a colony or commanding a starship fleet. Each leader has their own unique traits that provide additional positive or negative effects and can be upgraded, as the leader gains experience by working in their relevant field (military, economy or science).
The game begins on January 1, 2200 AD, upon the player empire's discovery of the hyperlane network. The default campaign length is 300 in-game years, divided into 100-year early-game, mid-game, and end-game segments dictating certain events and modifiers. The economy of a player's empire throughout the game is primarily based on six main resources: energy credits, minerals, food, consumer goods, alloys and trade, each having a primary purpose to contribute to the player's economy. There are also Strategic resources that are used to make advanced buildings, weapons, defences or endorsing edicts, that provide certain profit to the player. Unity, which can be obtained by supporting factions within the empire or by constructing buildings that produce it, is used to create and maintain edicts and unlock traditions; traditions are a series of bonuses, linked to a certain theme like espionage, exploration, mercantilism or militarism. Advancement in Stellaris is achieved through technologies and traditions which progressively scale in cost for the player to achieve, but provide better features for the player as the game continues.
After a certain period of time, 'Galactic Crises' can occur, whose goal is to make the later game more difficult for the player. Crises are divided into mid-game and late-game ones; the first can include events like a crusade by a marauder empire or an invasion by nanomachines from an extragalactic cluster. Late-game crises might include an awakening of hostile dormant sentient AI or an invasion by extra-dimensional or extra-galactic forces, these being either randomly chosen or selected by the player at the start of the game. Paradox hoped that this feature would address a common late-game problem in 4X style games; whereby one faction is so powerful that their eventual victory is inevitable, resulting in frustrating gameplay. Subsequent expansions have added multiple ways for player empires to become a crisis faction themselves by researching dangerous technologies that imperil the entire galaxy: harvesting stars for energy, attempting to rewrite the laws of physics, genetically engineering dangerous space creatures, or destroying the entire galaxy by turning every star into a black hole. These options provide the player with an alternative method to win the game should they be skilled enough to complete the crisis objective while often facing off against the rest of the galaxy.
Later in the game, the player is offered to choose between several "ascension paths", which radically alter the inhabitants of a player's empire. These include advanced genetic engineering, cybernetic augmentation, psionic powers, or uploading the minds of your species into a machine body. Machine empires, who already started as such, choose between different ascensions like advanced nanotechnology or transportation of the civilisation into a virtual simulation.
Development and release
Stellaris was developed by Paradox Development Studios and published by Paradox Interactive. The game uses the same Clausewitz Engine that the studio has used since Europa Universalis III in 2007 albeit with some modifications, such as the usage of physically based rendering (PBR). The game was presented at Gamescom in August 2015. Director Henrik Fahraeus describes his influences as "one third Star Control 2, one third Master of Orion 2 and one third Europa Universalis IV", to "create a strategy game with particular focus on exploration and expansion". The team also referenced Star Control II with several character concepts and personalities, including alien races who resemble birds, mushrooms, and gas clouds.
Stellaris was released to the public on May 9, 2016. After launch, the developers confirmed that there would be a number of expansion packs, as well as free updates to address bugs and introduce new gameplay features. The updates were named after famous science fiction writers, including Stanisław Lem, Arthur C. Clarke, Isaac Asimov, Robert A. Heinlein, Iain Banks, Douglas Adams, Ray Bradbury, Karel Čapek, Pierre Boulle, C. J. Cherryh, Larry Niven, Ursula K. Le Guin, Gene Wolfe, Tanith Lee, and Mary Shelley, until 2022, when they began to take the names of constellations starting with 3.3, "Libra".
The game is accompanied by free patches, which may adjust existing mechanics or add new ones in the same theme as the expansions. The first major patch arrived on May 24, shortly after the game's release, featuring numerous improvements to the AI, as well as an additional playable race. The 2.0 patch (Cherryh), released in February 2018, revamps a significant amount of game mechanics, even for players who have not purchased the corresponding "Apocalypse" DLC. The 2.1 (Niven) update, released alongside the "Distant Stars" DLC in May, revamped the base game play loop and added more quality-of-life features. The 2.2 (Le Guin) update was released in December, along with the "Megacorp" DLC, and revamped how planets are organized. The 3.0 (Dick) update was released in April 2021, coinciding with the release of the "Nemesis" DLC. Minor releases have continued through 2022 with 3.5 being released September 2022.
There have been plenty of story packs and species packs that have been released, each adding a new in game events, origins, empire types, species, traits, civic, and ascension perks. Plantoids Species Pack dropped August 4, 2016 being the first, and the latest being Astral Planes, released November 16, 2023.
Expansions and DLCs
A number of DLCs have been released for the game. All are optional and may be applied to the base game in any combination. The largest DLCs come in the form of expansions, which significantly alter the mechanics and features of the game. There are also story packs (which add new events and minor mechanics) and species packs (which add new species, with accompanying audio, visuals and mechanics).
Reception
Pre-release
In a preview of the game at Rock, Paper, Shotgun, Adam Smith wrote that Stellaris "could be Paradox's finest hour, and a landmark in the development of both 4X and grand strategy design".
Critical response
Stellaris received "generally favorable" reviews, according to review aggregator website Metacritic. A number of reviews emphasized the game's approachable interface and design, along with a highly immersive and almost RPG-like early game heavily influenced by the player's species design decisions, and also the novelty of the end-game crisis events. The more mixed reviews also noted that the mid-game could be less satisfying, thanks to an overly simple diplomatic system and a somewhat passive AI.
Sales
Less than 24 hours after release, Paradox Interactive announced that Stellaris had sold over 200,000 units, breaking the revenue record for any of Paradox Interactive's previous titles during the same time period. It almost matched the sales record currently held by Cities: Skylines. It became Paradox Development Studio's fastest selling game. On 21 June 2016, the game had sold over 500,000 units. On 12 May 2020, the publisher announced a new record for total players online, with the game's sales exceeding 3 million units.
Spin-offs
In June 2023, a spin-off titled Stellaris: Nexus was announced. It is developed by Whatboy Games. During the early access period, the game dropped the Stellaris name and was retitled to Nexus 5X. The game is still set in the Stellaris universe.
Star Trek: Infinite was released on October 12, 2023 by Paradox. It was described as extremely similar to Stellaris.



