Development

Stronghold 4 is developed and published by Firefly Studios, the team behind the Stronghold series. The studio has framed the project as an attempt to capture the spirit of classic strategy games while adding the modern features players now expect, bringing medieval immersion to the front of the experience.

The game marks the series' move to a modern engine, Unreal Engine 5, while keeping the classic raised, top-down viewpoint that the series is known for. This technical leap underpins the larger maps, the more detailed world, and the dynamic weather and lighting. The move also returns the series to fully 3D worlds, building on the direction of its more recent entries while preserving the familiar overhead camera.

Firefly has said Stronghold 4 entered development around 2022, when the studio set up two internal teams: one building the 3D Stronghold 4 in Unreal Engine, and another working in Unity on the studio's separate 2D projects. That split let the 3D team focus on the visual scale of walls, troops, and the natural world.

Announcement and release

Stronghold 4 was revealed at the PC Gaming Show on June 7, 2026, the first mainline Stronghold in five years. A free public demo launched on June 23, 2026 during Steam Next Fest, giving players their first hands-on with the game. Firefly plans to launch into early access in 2026 and has suggested it expects to spend around six months there, refining the game with player feedback before a full release. That window could change. Early hands-on previews describe the demo as offering one economy-focused mission and one military-focused mission, with the campaign's story content held back for the full release.

Firefly has framed the goal as letting players feel the impact of a living medieval world on their castle economy and siegecraft. The reveal landed well with the audience: by the time the demo arrived, the game had passed 250,000 wishlists. Players who want to know whether their PC can run it can check the system requirements.

Firefly has also set out how it intends to run the early access period. The studio says it may consider raising the price during early access as new features and content are added, and it lists the routes it watches for player input: an in-game feedback form, its official community server, the store discussion boards, its social channels, and bug reports filed either in game or through its website. It has committed to documenting changes through news posts, video updates, and patch notes. The studio has also said it is using the demo's player survey to gather views on what players would consider a fair price.

Building the castle simulator

In August 2026 Firefly published a long developer video in which the leads behind the game's design, narrative, and art talked through how the team is rebuilding the castle simulator. The studio describes Stronghold 4 as built from the start in Unreal Engine 5, calling it its first major engine shift in decades, and credits the new toolset with new units, rolling realistic landscapes, refined destruction technology, and cinematic narrative aids. Firefly also framed the work as drawing on a quarter century of its own development history, looking back at what did and did not work in the studio's past titles and folding those lessons into this one.

Firefly took Stronghold 4 to Gamescom in August 2026, showing the game on the floor and saying that new material would debut during a partner showcase on 26 August.

Story and sound

The cinematic campaign is brought to life by a voice cast that includes Ben Starr, Samantha Béart, Walles Hamonde, and Harry McEntire, with an original score composed by Robert L. Euvino.

The studio

Firefly Studios is based in London and has developed and self-published strategy games since 1999. The company is BAFTA nominated, and it credits two studio heads on Stronghold 4: Paul Harris and Nick Tannahill.

In July 2026 Firefly began publishing games made by other developers under a new label, WuselFaktory. The studio framed the move as an addition rather than a change of direction, saying that internal development of the Stronghold series and its other projects carries on alongside the new label.