Hearts of Iron IV continues its post‑launch expansion rhythm with a steady stream of DLCs that add new national focus trees, mechanics, and quality‑of‑life improvements. The latest official tease comes from a Steam Dev Corner post in which the community modders Alex, Norrman, and Marijn211—now working directly with Paradox—showed an early preview of a future Romania‑centric DLC. This article examines what that preview tells us about the next country pack, reviews the focus trees that have already arrived in 2026, and outlines which regions still lack dedicated national trees as the year progresses.

How it works

The Steam Dev Corner post dated August 18, 2026, frames the upcoming Romania DLC around a new mechanic called International Cooperation. According to the post, this system is designed to sit at the core of Romania’s political branches, allowing the player to maintain diplomatic relationships with multiple factions simultaneously, even when those factions are opposed to each other in the broader conflict. The preview explains that the International Cooperation mechanic will connect Romania’s political tree to choices that affect foreign policy, enabling decisions such as a Polish‑Romanian Alliance that can trigger joint defensive wars when the conflict lines up with a border against the Soviet Union.

The post also outlines the three major industrial and economic directions previewed for Romania. Players can either lean on Romania’s existing agrarian and resource strengths or push hard toward industrialization, with focuses such as “Invest in the Resita Group,” “Diversify MALAXA,” “Expand American Cooperation,” and “Study Foreign Tank Designs.” Economic focuses mentioned include “Finalize Tax Reforms,” “Tariff Enforcement,” “Breadbasket of Europe,” and “Balkan Industrialist.” On the political side, the preview hints at several competing routes: a fascist branch with multiple sub‑paths, a communist branch that can lead to a three‑sided civil war, and a historical path that reflects Romania’s 1944 defection to the Allies. The post notes that unique icons for the communist branch are still pending, indicating that the content is still in an early feedback stage.

Importantly, the Dev Corner post makes clear that the preview is intentionally early. The development team is seeking community feedback before locking in any final designs, meaning that the exact scope of the Romania DLC could still shift based on player input.

Build path

To understand where the Romania DLC fits within the broader 2026 roadmap, it helps to look at the other official DLCs that have already been released this year. On May 12, 2026, Paradox issued a press release announcing Thunder at Our Gates, a theater pack that launched on June 11, 2026 alongside the free Patch 1.19 “War Effort.” This pack added national focus trees for three nations caught between rival empires: Australia, Siam (historical Thailand), and the Dutch East Indies (playable Indonesia). Alongside the focus trees, the theater pack introduced two cross-factionfaction. An in-game group or nation players can align with or fight against, with its own goals and reputation system. systems—Army Headquarters and Ship Captains—and was paired with a free War Effort patch whose headline addition was the Regimental Support feature for attaching support companies to divisions, alongside click-reduction technologies, naval balance changes, and late-game performance improvements.

Earlier in the year, on April 22, 2026, Paradox released the Peace for Our Time focus pack (Patch 1.18) for $5.99 / £4.99 / €5.99. This pack was the first to include new national focus trees created in collaboration with veteran modders, and it centered on Czechoslovakia. The pack added democratic, communist, monarchist, and fascist national paths for Czechoslovakia, introduced the Divided Nation mechanic, included the Army Readiness Balance of Power forces, and added new art, music, and equipment graphics.

Taken together, these official releases show a clear pattern for 2026: Paradox is delivering a mix of theater packs and focus packs, each of which brings one or more new national focus trees to the game. The theater pack model tends to add three nations at once (as seen with Thunder at Our Gates), while the focus pack model typically concentrates on a single nation (as with Peace for Our Time and the forthcoming Romania DLC). The cadence suggested by the releases so far is roughly one major DLC every six to eight weeks, with a free update accompanying each major paid release.

Given this rhythm, the Romania DLC looks set to be the next major focus pack after Peace for Our Time. Its preview, dated August 18, 2026, slots neatly into the timeline, suggesting a likely release window in the latter part of Q3 or early Q4 2026. The developers’ emphasis on gathering feedback before finalizing content indicates that the final scope may still evolve, but the core elements—International Cooperation, industrial branching, and multiple political paths—are already confirmed in the preview.

Confirmed vs. rumored content

Confirmed (based on official sources):

  • Thunder at Our Gates theater pack (released June 11, 2026, $19.99 / £16.75 / €19.99) – focus trees for Australia, Siam, Indonesia; Army HQs; Ship Captains; free War Effort patch 1.19 (headline feature: Regimental Support).
  • Peace for Our Time focus pack (released April 22, 2026, $5.99 / £4.99 / €5.99, patch 1.18) – focus tree for Czechoslovakia; Divided Nation mechanic; Army Readiness Balance of Power.
  • Romania DLC preview (Steam Dev Corner, August 18, 2026) – International Cooperation mechanic; industrial and economic focuses; multiple political branches (fascist, communist, historical); pending unique icons for communist branch.

Rumored or unspecified (no official confirmation yet):

  • Exact release date for the Romania DLC.
  • Whether the Romania DLC will be a standalone focus pack or part of a larger expansion pass.
  • Any additional nations that might be bundled with the Romania DLC in a theater‑pack style release.
  • Details on any further DLCs planned for late 2026 beyond the Romania pack.

Which regions still lack focus trees

Looking at the official focus‑tree additions for 2026 to date, the following nations have received new or reworked national trees:

  • Australia (Thunder at Our Gates)
  • Siam / Thailand (Thunder at Our Gates)
  • Indonesia / Dutch East Indies (Thunder at Our Gates)
  • Czechoslovakia (Peace for Our Time)

All other nations in the base game—including major powers such as Germany, the Soviet Union, the United Kingdom, France, the United States, Italy, Spain, Portugal, China, Japan, and numerous minor states—have not yet received a dedicated focus‑tree update in any of the 2026 DLCs. While some of these countries have received mechanical changes or generic updates through free patches (e.g., the naval overhaul in the War Effort patch), their national focus trees remain as they were in the base game or as modified by earlier DLCs. Consequently, a significant portion of the game’s roster still lacks the kind of focused, alternate‑history depth that the recent DLCs have brought to the four nations listed above.

Committed 2026 cadence

The cadence implied by the official releases so far is a steady alternation between theater packs and focus packs, each accompanied by a free quality‑of‑life patch. The timeline shows:

  • April 22, 2026: Peace for Our Time (focus pack) + free patch.
  • June 11, 2026: Thunder at Our Gates (theater pack) + War Effort patch.
  • August 18, 2026: Romania DLC preview (indicating imminent release).

If the pattern holds, players can expect another major DLC roughly every six to eight weeks, with a free update launched alongside each paid release. This cadence suggests that the Romania DLC will likely appear in late September or early October 2026, followed by potentially another theater pack or focus pack toward the end of the year. The developers have not announced any deviation from this schedule, and the regular cadence of updates aligns with the studio’s stated commitment to keep Hearts of Iron IV evolving throughout its second decade.