Feudums

Feudums is a blend of grand strategy, turn-based 4X and social strategy, where players shape a medieval world through diplomacy, economic decisions and war. You rule a domain and build a noble house across campaigns, with consequences that carry forward into its legacy. Vassals, rivals and lieges are all real players, and agreements are not binding, so allegiances and political structures can shift.

A living world

Each campaign runs on a shared, tick-based simulation: player actions resolve in synchronized intervals, and the world continues to change whether you are present or not. Seasonal and political storms, economic strain, wars, betrayals, feudal obligations and new opportunities can all reshape your position. The game is designed for asynchronous multiplayer, with decisions planned and carried out over time; high-level instructions can give your domain some semi-autonomous behaviour while you are away.

Campaign outcomes persist as part of your house’s ongoing legacy. You play as different figureheads of your dynasty, shaped by unlocked traits, agendas and legacy options that influence how the next chapter begins. Wounds fade, but scars endure, and houses remember their past.

Rule your domain

You issue directives for your fiefs, setting production, local rules, construction and defence. Seasonal or conditional plans and priorities can continue to run in your absence. You can delegate authority to vassals and stewards, relying on incentives, reputation and obedience rather than managing every detail. Administrative reserves accumulate while you are offline and can be spent to accelerate important directives in focused bursts.

Your authority depends on relationships with other players. You manage a hierarchy of lieges, vassals and peers through reputation, leverage and mutual dependence; swear fealty, demand obligations or challenge your liege; and form alliances around shared goals. You can also conceal your intentions, mislead rivals or use selective communication to shape how others see your position. Agreements can be ignored or broken, but doing so risks reputational damage, retaliation and longer-term consequences.

Shape your economy

Economic and territorial decisions work across several levels. At the local level, you manage tiles with farms, settlements, abbeys, castles, quarries and mines, configuring each structure’s focus. Across a fief, you set workforce priorities, regional rules and development policies; across your domain, you direct expansion, relations with other domains and external trade.

Workers can be assigned through seasonal and conditional priorities, using detailed adjustments or higher-level directives. Terrain and improvements offer flexible but mutually exclusive specializations that you can change as priorities shift, including wider regional choices such as mining towns and maritime trade hubs. Trade and tribute pass between players through feudal obligations, agreements and recurring arrangements, alongside a global market shaped by player supply and demand.

Prepare for war

War depends on preparation, timing, terrain, coordination and reading changing circumstances. Harsh winters make long marches dangerous, while changing weather can create opportunities for defenders and invaders. Mountain and marsh crossings and sea travel carry risks but can open routes to objectives; terrain and natural borders can also be used to your advantage.

You coordinate campaigns with allies and vassals through shared objectives, plans, reinforcements and logistical support. Armies can be raised through feudal obligations, or you can maintain a professional standing force at the cost of resources and political capital that might otherwise support diplomacy or land claims. Battles and campaigns involve logistics, positioning, unit composition, battle behaviour and strategic advantage.

Sieges and territorial conquest unfold over extended periods for asynchronous play. Garrisons and commanders continue to act on standing instructions while you are away, and allies and vassals can intervene. A sudden overnight collapse is unlikely unless the foundations of your realm have already been neglected.

Carry your house forward

Your house’s legacy reflects notable actions across its campaigns. During each campaign, you choose a persona from an expanding pool of unlocked traits, options and modifiers, enabling different strategic combinations. Deeds and stains shape that persona as you play, and significant outcomes feed into your house’s identity.

A heraldic system based on historical European heraldry lets you express that history through your house’s heraldic devices. Long-term progression is based on variety, identity and historical continuity rather than raw statistical power or linear advantages. A persistent chronicle records personas, achievements, failures and notable events across campaigns.

Customize the game

Feudums supports modding through rulebooks, world templates, an integrated map editor and an authoring and distribution system. Rulebooks can modify systems such as the economy, diplomacy, warfare and progression, or disable entire subsystems. World templates let you set geography, starting conditions and seasons, and adjust pacing from slow, PBEM-like campaigns to faster tick cycles with more granular resolution.

You can create and edit terrain, regions and starting areas in the map editor, use custom seed-based map generation, or combine the two approaches. Advanced mods can add custom logic, entities and scenario-driven rulesets, while total conversions can redefine the setting, systems and content. Mods and rule variants can be shared or exchanged through the integrated system.

Multiplayer worlds

Multiple worlds run in parallel with sustainable player populations, so play does not require massive player counts. Feudums supports different scales, from larger ranked worlds to smaller private multiplayer campaigns. Competitive outcomes are designed to depend on planning and coordination rather than continuous presence or raw time investment.