Checked 2026-08-17 against the Egosoft community wiki DLC index and the official store pages. Every “this is what it adds” claim below traces to one of those. Where a number is not published anywhere official — sector counts, ship counts, scenario counts — this page says so rather than rounding a forum guess into a fact.
The X4 store page is a wall of seven purchasable things, and the recurring Steam thread is always some variant of “Which DLC and why should I buy it?” or “Must-buy DLC’s?”. Every answer you get is a summary of what each expansion contains. That is the wrong direction. The question you actually have is the reverse one: I want to do X — does anything I have not bought stop me?
That reverse lookup is what nobody writes, because it requires knowing what is gated rather than what is added, and the two are very different lists. Several of X4’s headline systems are free base-game updates that the expansion marketing sits next to, and at least one expansion gates a mechanic that people assume is in the base game.
The seven expansions, and what each one locks
| Expansion | Released | Factions / relations | Ships and yards | New system or mechanic | Story | What is blocked without it |
|---|---|---|---|---|---|---|
| Split Vendetta | 30 Mar 2020 | Two Split family clans, each with its own economy | Split ship line, Split weapon tech, new station modules | None mechanically new — it is faction and construction breadth | Split clan storyline, new gamestarts | Split hulls and weapons, Split station modules, Split gamestarts. Nothing systemic. |
| Cradle of Humanity | 15 Mar 2021 | Two Terran factions with a separate economy; a returning pirate faction | Terran ship line, Terran weapons and stations | No new mechanic of its own — see the terraforming note below | Earth-and-jumpgate-shutdown storyline, new gamestarts | The Terran economy, Terran hulls and Sol-region content. The Terran economy is the single biggest structural addition of any expansion. |
| Tides of Avarice | 14 Mar 2022 | Two lawless factions (Riptide Rakers, and the scavenger/Northriver side) | Erlking, Astrid, tugs and deconstruction ships | Salvage. Towing wrecks, dismantling them, recycling scrap into building resources at recycling modules | Manipulated-resource plot; Astrid mystery | The entire salvage loop. If salvaging is your plan, this is not optional and no other purchase substitutes. |
| Kingdom End | 12 Apr 2023 | The Boron — completes the main-species roster | Boron ship line incl. Ray (destroyer) and Shark (carrier, side-docking) | Nothing systemic; the Shark’s side-docking is a ship trait, not a system | Multifactional jump-gate expedition; Heretic’s End | Boron hulls, Boron space, Boron relations. Roleplay and variety, not capability. |
| Timelines | 20 Jun 2024 | Adds a faction via unlocks | Reimagined classic X-universe ships, unlocked by completing scenarios | Scenario mode — self-contained missions outside the sandbox | Harper Donel campaign, told outside the open universe | A separate mode plus the ships and points of interest its scenarios unlock into your sandbox. Nothing in the sandbox requires it. |
| Hyperion Pack | 20 Feb 2025 | None | The Hyperion: six main gun mounts, M turrets, L shields and engines, docking for three S ships | None | Mission chain to earn it; Hyperion gamestart | One ship, one sector, one gamestart. |
| Envoy Pack | 10 Sep 2025 | None directly — it plugs into the free Diplomacy systems | Envoy stealth frigate and its Cypher variant | Cloak stance for radar evasion; faction camouflage; shorter agent operations | Mission chain to unlock the Envoy | Cloak and camouflage, and the fastest agent operations. The diplomacy layer itself is free. |
Read the last column and the shape of the purchase changes. Only one expansion gates a system — Tides of Avarice and salvage. Everything else gates content: hulls, sectors, factions, plots. That distinction is the whole decision.
Three things people buy a DLC for that are already free
This is where the marketing pages will mislead you if you read them as a checklist.
- Terraforming. The Cradle of Humanity store page lists “a new terraforming feature, evolving the endgame” among its bullets. Egosoft’s own release announcement puts terraforming in the free 4.00 update, which shipped the same day. The two launched together; only one of them costs money, and it is not the one with terraforming in it.
- Diplomacy, the Embassy and agents. Introduced by the free 8.00 Diplomacy update in September 2025. The Envoy Pack shipped alongside it and is the best ship for that work — shorter agent operations, cloak, camouflage — but you do not need it to run diplomacy at all.
- Station building, boarding, fleet command, the economy simulation. All base game. None of the seven expansions is a prerequisite for the parts of X4 that people describe as X4.
If your reason for buying an expansion is any of the above, you already own the reason.
Goal to verdict
Pick the row that matches what you want your playthrough to be. The verdicts genuinely contradict each other across rows — Tides of Avarice is unskippable in one and pointless in another — which is the point of doing this backwards.
| Your goal | Required | Strongly recommended | Skippable for this goal |
|---|---|---|---|
| Salvage / scrapping economy | Tides of Avarice — the mechanic does not exist without it | Cradle of Humanity, for a second economy to sell the recycled output into | Kingdom End, Timelines, Hyperion, Envoy |
| Combat and fleet warfare | None — the base game gates nothing here | Cradle of Humanity (Terran weapon and ship line), Split Vendetta (Split weapon tech) | Timelines, Envoy, and Tides of Avarice if you are not salvaging |
| Economy and trade empire | None | Cradle of Humanity — a separate Terran economy is the biggest structural change on offer; Split Vendetta for trade breadth | Hyperion, Envoy, Timelines |
| Exploration | None | All the sector-adding ones stack: Split Vendetta, Cradle, Tides, Kingdom End. Hyperion and Envoy each add one sector | Timelines — its content sits mostly outside the sandbox |
| Roleplay / species playthrough | The expansion for that species: Split Vendetta, Cradle (Terran), Kingdom End (Boron) | Whichever gamestart you want to begin from | Everything outside your chosen species |
| Story and missions | None | Cradle of Humanity, then Timelines if you specifically want authored scenario content | Hyperion and Envoy are single mission chains, not campaigns |
| “I want one purchase and that is it” | None | Cradle of Humanity. It is the community’s near-unanimous first pick, and it is the only one that adds a whole parallel economy | Everything else, until you have a second reason |
The one row worth arguing about is the last. The community consensus that Cradle should be first is a preference claim, not a measurement — the threads also assert it contains “the strongest shields” and “two of the most powerful ships”, and we could not verify either against an official source, so treat those as forum opinion. What is verifiable is structural: it is the only expansion that adds a second, separate economy, and that changes more of your playthrough than any hull does.
What is not published, and we are not going to invent
- Sector counts per expansion. Egosoft’s store and wiki pages describe new regions qualitatively (“Windfall and Avarice systems”, “a brand new sector”, “a massive expansion of the universe”) and do not publish a per-DLC sector total. Any tidy number you see in a table elsewhere was counted by a player off a map, not stated by the developer.
- Ship counts per expansion. Same situation — “many new ships” is as specific as the official material gets, apart from named hulls.
- Timelines scenario count. The Egosoft community wiki page for Timelines explicitly says the full scope of content is unknown and gives no number.
- Whether relations are strictly additive. Each faction-adding expansion brings its factions into the reputation web, but we found no official statement quantifying how existing faction relations shift when a new one is present, so this page does not claim one.
Three unverifiable-number classes and one unverifiable behaviour claim, all left as gaps rather than filled in.
The order that follows from all this
If you are buying more than one, the sequence that falls out of the table is not the release order and not the price order. It is: the expansion that unblocks a mechanic you want, then the expansion that adds an economy, then breadth. Concretely — Tides of Avarice first only if you intend to salvage, Cradle of Humanity otherwise, then Split Vendetta, then Kingdom End, then the small packs, and Timelines last or never depending on how you feel about content that lives outside your save.
If salvage is why you are here, note that owning the DLC is only half of it: the tugs and deconstruction ships have their own set of ways to sit idle doing nothing, and that is a configuration problem rather than a purchase one — see the idle salvage ship triage list. And if you are buying an expansion because your existing game has stalled, check first whether the stall is structural rather than a content shortage: the logistics setup decision covers walls that no purchase removes. For the combat row above, the 9.0 weapon time-to-kill comparison is the place to check whether a DLC weapon line is actually an upgrade for you, and since 9.00 rebalanced hulls alongside weapons, the 9.00 ship stat delta ledger is the place to check whether a DLC ship you’re eyeing changed under you too, before fleet sizing against Xenon stations shows how far base game hulls already get you.
Sources
- X4: Foundations Wiki — Downloadable Content index — official list of the seven expansions with release dates, used for every date in the matrix
- X4: Foundations Wiki — Tides of Avarice — salvage, tugs, deconstruction ships, recycling into building resources; Windfall and Avarice systems
- X4: Foundations Wiki — Timelines — storyline sits outside the sandbox; scope of content stated as unknown
- X4: Foundations Wiki — Hyperion Pack — Hyperion armament, L shields and engines, three-S-ship dock, new sector and gamestart
- X4: Foundations Wiki — Envoy Pack — Envoy and Cypher, cloak stance, faction camouflage, reduced agent operation duration
- Egosoft news: 4.00 update and Cradle of Humanity now available — terraforming named as part of the free 4.00 update
- X4: Cradle of Humanity on Steam — two Terran factions with their own economy, ships, weapons and stations; new gamestarts; the terraforming bullet discussed above
- X4: Split Vendetta on Steam — two Split clans, Split weapon technology, new station modules, new gamestarts
- X4: Kingdom End on Steam — Boron reunion completing the main faction roster, Ray and Shark, Heretic’s End
- X4: Tides of Avarice on Steam — Erlking, Astrid, pirate and scavenger factions
- Egosoft reveal the free Diplomacy update — GamingOnLinux — Embassy and agents ship in the free 8.00 update, not in a paid pack
- “Which DLC and why should I buy it?” — X4 General Discussions — used only as evidence of the recurring question and of community preference, not as a source for any figure
- “Must-buy DLC’S?” — X4 General Discussions — same, community preference evidence only
