Two rival kingdoms, a prince with a difficult diplomatic assignment and battles that can be fought from either side of a siege. Diplomacy is Not an Option has expanded its medieval fantasy warfare with Fog of War, a paid story DLC that puts the Ironbrow dynasty back in the spotlight. However, players who skip the expansion still have something new to explore.
Developer Door 407 released Fog of War on November 10, 2026, for Windows PC through Steam. Alongside its 10-mission campaign, a free update introduces two enemy factions to Sandbox Mode and the Map Editor. That distinction matters because the launch expands both the narrative campaign and the tools available to existing players.
Diplomacy is Not an Option brings a new war to the Ironbrow dynasty
Peace remains elusive in Samreignia. Still recovering from a civil war, its new king must deal with declarations of war from two powerful neighbors: the Great Kingdom of Inverland and the Gorgoth Empire. Rather than immediately committing to another conflict, he sends his son, Prince Connor Ironbrow, to negotiate a peaceful resolution.
Connor is hardly the ideal diplomat. His temperamental personality may not make him the easiest negotiator, although his principles give him a clear sense of responsibility. Accompanied by his advisor Snoot, the prince enters a political dispute where military strength and personal relationships are closely connected. His complicated relationship with Nayana, the Gorgothian vice-princess, adds another dimension to the story.
This narrative approach gives Fog of War a different focus from simply surviving increasingly large enemy attacks. The campaign connects political tensions with the practical demands of warfare. Consequently, players can expect a mixture of city development, defensive preparations, territorial conquest and enormous confrontations.
According to Door 407’s official Steam announcement, the DLC introduces the following content:
- 10 new story missions continuing the Ironbrow dynasty’s adventures.
- Two rival powers involved in the conflict: the Gorgoth Empire and the Great Kingdom of Inverland.
- New characters and environments connected to Connor’s diplomatic mission and the wider war.
- City construction and stronghold conquest as part of the campaign’s strategic objectives.
- Large enemy waves and massive battles that challenge defensive planning and army management.
- Enormous sieges experienced from both sides, bringing different perspectives to attacking and defending fortifications.
- New player-controlled units that expand the available military forces.
- A new boss with unique abilities that introduces an additional combat challenge.
Fog of War makes enormous sieges a central part of the campaign
One particularly interesting feature is the opportunity to experience sieges from both sides. Defending a settlement against overwhelming forces and attempting to capture a fortified position involve different tactical priorities. That contrast could make the new missions appealing to players who enjoy more than one approach to medieval warfare.
When defending, the familiar foundations of Diplomacy is Not an Option remain relevant. Players build settlements, establish defensive positions and raise armies to withstand enormous enemy hordes. However, attacking a stronghold shifts attention toward breaking through resistance and coordinating an offensive rather than simply surviving an assault.
These objectives fit the game’s established identity. Since its full release on October 4, 2024, Door 407’s strategy title has combined medieval fantasy city building with battles involving huge numbers of soldiers. Fog of War builds on that foundation through a more character-driven conflict, while its new units and boss provide additional battlefield variety.
For another take on oversized armies, All Army Attack explores massive forces through a roguelike auto-battler. Its recruitment and resource decisions differ considerably from Door 407’s siege-focused strategy, but both games place the management of large armies at the center of their appeal.
Diplomacy is Not an Option also expands its free Sandbox content
Buying Fog of War is not necessary to access every addition released alongside it. Door 407 has also deployed update 1.0.208_r, which brings several changes to the base game for all players.
The most substantial addition is the arrival of the Gorgoth Empire and the Great Kingdom of Inverland in Sandbox Mode and the Map Editor. As a result, these factions are not restricted to the paid story campaign. Players can use the expanded selection of enemies when experimenting with custom scenarios.
The free update includes:
- Gorgoth Empire enemies added to Sandbox Mode and the Map Editor.
- Great Kingdom of Inverland enemies added to those same modes.
- Mission List interface improvements, with mission banners highlighted when hovering over individual missions.
- Improved cutscene cropping for displays using a 4:3 aspect ratio.
- Wall III hitbox adjustments, reducing their size so friendly siege engines can fire over these walls more easily.
- Various bug fixes addressing additional issues.
The Wall III adjustment is particularly relevant to players who rely on defensive fortifications. Walls remain an important part of protecting a settlement, but the smaller hitboxes should reduce interference with siege engines positioned behind them. Meanwhile, the additional factions give Sandbox players more options without requiring a purchase.
This creates a useful separation between the two releases. Fog of War is aimed at players who want a new campaign, characters and mission objectives. By comparison, the free patch offers extra enemy variety and practical improvements to anyone who already owns the base game.
Fog of War is available on Steam with a launch discount
Fog of War launched on November 10, 2026, for Windows PC through Steam. It is paid downloadable content and requires a copy of Diplomacy is Not an Option. A new trailer also accompanied the release.
On the Spanish Steam store, the expansion has a regular price of €9.99. A 10% launch discount reduces that amount to €8.99. Players should also distinguish the DLC from two separately sold extras: the expanded soundtrack adds four new songs, while the wallpapers pack contains five new artworks.
The base game supports several languages, including English with full audio, Russian, French, Italian, German, Spanish from Spain, Chinese, Japanese, Korean, Turkish, Brazilian Portuguese and Polish. The Fog of War store page lists the same languages.
For players browsing other fantasy PC adventures, Crystals of Irm has also confirmed its release date. Although its RPG mechanics are quite different, it offers another option for those interested in fantasy settings and tactical encounters.
Ultimately, Diplomacy is Not an Option now offers two distinct reasons to return. Fog of War provides a new chapter of political conflict and large-scale siege warfare, while update 1.0.208_r makes additional factions available outside the paid campaign. For existing players, the most useful question is whether they want another structured story or simply more freedom to experiment with medieval battles.
Creator of the website, Pokemon trainer by nature. Trying to report on everything related to the world of video games, series and movies. Yu-Gi-Oh is my weakness, collecting cards since the dawn of time.
