The version is a specific incremental build of the 1.9 update for Polymorph Games' medieval city-builder, Foundation .
While 1.9 was the "Progression Update," the game has since reached its on January 31, 2025. The current development focus for 2026 includes: Foundation - Polymorph Games
Seeing a specific build like Foundation.v1.9.1.3.0112.rar usually points to: Foundation.v1.9.1.3.0112.rar
: The economy was completely overhauled. While markets used to generate gold directly, coins are now collected through a Tax Office . You must manage the delicate balance between filling your coffers and keeping your villagers happy.
: Many players stick to specific 1.9 builds to ensure their Mod.io creations remain stable, as the 1.9 update broke many legacy mods from earlier versions. The version is a specific incremental build of the 1
The 1.9 update, titled the , was a transformative milestone that moved the game away from its early alpha roots into a more structured simulation with deep mechanical consequences. Core Gameplay Shifts in 1.9
: You no longer unlock everything linearly. You must now choose to favor one of three Estates: Labor , Clergy , or Kingdom . While markets used to generate gold directly, coins
: The military system was expanded, allowing you to send companies abroad to retrieve rare resources like Marble or Gold , which are essential for late-game monuments. Technical Context of the .rar File