Foundation: Harvest Festival

Foundation: Harvest Festival is the first major paid expansion for the medieval city-building game Foundation. It adds livestock, fruit and vegetable growing, new processing chains and a festival ground at the tavern.

The additional goods and buildings work together: only with well-organized farming can the celebrations be expanded and increasingly demanding guests be catered for.

Foundation: Harvest Festival was released for PC on Oct 8, 2026. Polymorph Games also released a free update for the base game with a compendium, an additional tavern and improvements to controls.

Harvest Festival is available for Windows PC via Steam. Foundation is required to play. No console version of the expansion has been announced.

Farming becomes more varied and preparing a festival becomes a new long-term goal. Fields, barns and processing businesses supply the ingredients for food and drink. Musicians and entertainers perform at the celebration on a freely expandable festival ground.

Harvest Festival includes ten new buildings with more than 120 building parts, 14 additional resources and its own development task with a new village title. Animals with offspring, traveling artists and around 20 minutes of new music are also included.

As minimum, Steam lists Windows 10 64-bit, an Intel Core i5-4460, 8 GB RAM and a GeForce GTX 960 or Radeon R9 290 with 3 GB graphics memory. Recommended are an Intel Core i7-6700K, 16 GB RAM and a GeForce RTX 2060.

Chickens, pigs and geese move into the modular Common Crofts. Their pens can be adapted to the settlement. Eggs and animal products expand the supply of goods, while chicks, piglets and goslings bring the farms to life.

Three specialized orchards supply apples, plums and hazelnuts. Additional vegetable fields are used to grow cabbage and turnips. This gives rural areas new tasks beyond traditional arable farming.

The cider press processes fruit into cider, the drying oven supports preservation, and other workstations use new raw materials. The recipe system lets you switch between different production methods, instead of assigning each business just one fixed process.

The new festival grounds expand the tavern and can be decorated. For a celebration, food and drink must be ready, artists hired and guests catered for. As reputation grows, more facilities are unlocked and high-ranking visitors can be invited.

The player's own aspiration "Master of Harvests" links expanding agriculture with increasingly elaborate festivals. Those who follow this path can unlock an additional village title and focus their settlement on the celebrations.

The expansion adds around 20 minutes of extra music. For the first time, a lute can be heard, fitting the rural atmosphere and the festivals at the tavern.

The free update from Oct 8, 2026 adds the Compendium as a reference for recipes and systems, the elegant tavern, a new time of day with dawn, and modular sawmill parts. It also includes a building search and other user interface improvements.

Harvest Festival includes German menus and text. Like Foundation, the expansion focuses on single-player city building and supports Steam features for save games and achievements.