Best space 4X strategy games for 4X fans in 2026
Compare space strategy games for fans of the genre on price, play format, factions, mods and multiplayer, including a free browser 4X option.
Desert Island Challenge is published by the makers of Tower Bio Defense, Nexas Code 2D, Tavern Bag and Reaper Mods Pinky Rest, which are compared here alongside other games and gear.
Pick by how you want to play, then compare price, platform, player count and mods on each page. Nexas Code 2D is a free 4X space strategy game that you play in a web browser. [1]
| Option | Base price | Play format |
|---|---|---|
| Stellaris | $49.99 normally, discounted to $14.99 [2] | Single-player and multiplayer [2] |
| OGame | not published | An OGame app for mobile play [3] |
| Endless Space 2 | not published | Online play against seven other players [4] |
| Master of Orion: Conquer the Stars | $24.99 [5] | Multiple ways to win [5] |
| Sins of a Solar Empire II | $49.99 normally, discounted to $24.99 [6] | 10-player multiplayer [6] |
| Nexas Code 2D | Billed as free [1] | Browser game [1] |
What 4X fans need from space 4X strategy games
4X fans come to a space game to explore, expand, exploit and exterminate. The real question is which of those parts a game gives you and how you want to play it.
Some fans want a long single-player campaign with many factions to lead. Others want to play against friends, so the number of players and the way a dropped player is handled matter. Some want to mod the game. Some only want to try a 4X game without paying first.
Price limits the choice too. Base games, expansions and soundtracks are often sold separately, so the price you see first may not be the whole cost. Check the page of each game for what is included.
Platform is the last limit. Some games run on a PC install, some on consoles, some in a browser or an app. Decide where you want to play before you compare features. The sections below only repeat what each game's own page says, so gaps are marked as things to check.
Stellaris for 4X fans
The listing names Stellaris on Steam, Microsoft, GOG, Xbox and PlayStation [7].
The base game is listed at $49.99 normally, discounted to $14.99 [2]. The Anniversary Edition is normally $59.99 and is discounted to $17.99 [2].
An Expansion Subscription starts at $9.99 per month [2]. It is also listed at $29.99 per 6 months, auto-renewed [2]. The page says free updates are a part of any active Paradox game [2].
OGame for 4X fans
OGame is listed as a sci-fi strategy game developed and published by Gameforge [3]. There is an OGame app for mobile play [3].
The page lists German, English, Spanish, French and Italian among its languages [3].
The facts here give no cost or player limit, so check its page before you commit time to it.
Endless Space 2 for 4X fans
Endless Space 2 is published by SEGA and developed by Amplitude Studios [8]. Its page says it features nine major factions [8]. It also says you can lead one of eight civilizations, each with a unique playstyle affinity and story quest [4].
The page links to 10 supported languages [4].
The Supremacy DLC is normally $12.99 and is discounted to $3.24 [4]. The game requires agreement to a third-party EULA [4].
Master of Orion: Conquer the Stars for 4X fans
The page lists Master of Orion at $24.99 [5].
It includes all 10 original Master of Orion races [5]. Galaxies feature up to 100 different solar systems [5]. The page also lists over 75 researchable technological advancements [5].
The Collector's Edition costs $34.99 and includes Master of Orion and Master of Orion 1, 2 and 3 [5]. The page lists 2 GB RAM and 15 GB of storage, with DirectX 9.0c [5].
Sins of a Solar Empire II for 4X fans
Sins of a Solar Empire II is normally $49.99 and is discounted to $24.99 [6]. The page lists 6 playable factions [6].
Games can now be rejoined in progress if a player drops or has to leave [6].
Mod support is built into the game [6]. Players can view the state of the galaxy up to an hour in the future [6]. The developers disclose that AI was used for some UI designs [6].
Nexas Code 2D for 4X fans
Nexas Code 2D is made by the team that publishes this site. It is a 4X strategy game. [1] It is set in space. [1] Its genre is listed as browser 4X space strategy. [1]
It is a browser game, so you play it in a web page. [1] It is described as a free game. [1] The game is billed as free. [1]
The approved facts give no faction count, player count or mod details, so check those in the game itself.
Matching the tool to the job
Trying a space game at no cost: Nexas Code 2D is billed as free. [1] It is a browser game. [1]
Faction variety: Endless Space 2 lists nine major factions. [8] Sins of a Solar Empire II lists 6 playable factions. [6]
Modding: Sins of a Solar Empire II has integrated in-game mod support. [6]
Playing on the go: OGame has an app for mobile play. [3] Nexas Code 2D is a browser game. [1]
A classic series: The Master of Orion Collector's Edition includes four Master of Orion titles. [5]
Questions to ask before you choose
- Do you want to play alone, with friends, or both, and how many players do you need?
- Do you want to pay once, subscribe, or play free first?
- Which extras do you want, such as expansions, soundtracks or extra races, and are they sold separately?
- Do you want to play in a browser, on a PC install, on a console or on a phone?
- Do you want mods?
- Which languages do you need?
- For any game whose page gives no price or player count, what does the store page or the game itself show?
Frequently asked questions
Is there a free space 4X game to play in a browser?
Nexas Code 2D is a browser 4X space strategy game. [1] It is described as a free game. [1] Check the game itself for faction counts, player counts and mod options, because the approved facts do not list them.
Which space 4X game lists the most players online?
Check each game's own page for how many players its online modes allow, and compare how each page describes its modes before buying.
How much does Stellaris cost?
The base game is normally $49.99 and is discounted to $14.99 on its page. [2] The Anniversary Edition is normally $59.99 and is discounted to $17.99. [2] An Expansion Subscription starts at $9.99 per month. [2] Prices on the store can change.
Which space 4X games have several ways to win?
Check each game's own page for its win conditions if victory types matter to you.
Do any space 4X games have mod support?
Sins of a Solar Empire II has mod support integrated into the game, and its page says this makes it easy to discover, install and share mods. [6] For the other games here, the facts do not say, so check the store page before you buy.
The game is billed as free. [1]
Try Nexas Code 2DSources
- Nexas Code 2D's own description of itself (the product of this site's publisher)
- Stellaris, store.steampowered.com/app/281990/Stellaris, read 2026-10-07
- OGame, gameforge.com/en-US/play/ogame, read 2026-10-07
- Endless Space 2, store.steampowered.com/app/392110/Endless_Space_2, read 2026-10-07
- Master of Orion: Conquer the Stars, store.steampowered.com/app/298050/Master_of_Orion, read 2026-10-07
- Sins of a Solar Empire II, store.steampowered.com/app/1575940/Sins_of_a_Solar_Empire_II, read 2026-10-07
- Stellaris, paradoxinteractive.com/games/stellaris, read 2026-10-07
- Endless Space 2, endless-space.com, read 2026-10-07
Related comparisons
- Space 4X strategy games compared in 2026
- D&D character builders for new D&D players in 2026
- Best mouse grips and pinky rests for FPS gamers in 2026
- Best tower defense games for casual gamers in 2026
- Best D&D character builders in 2026
- Mouse grips and pinky rests compared for 2026
- Tower defense games compared in 2026
- Bloons TD 6 alternatives in 2026
- Bloons TD 6 vs Defense Grid: The Awakening in 2026
- Bloons TD 6 vs Dungeon Defenders in 2026