Avoid "free" download sites or "cracked" versions of v120r3. These files often contain or unstable code that can crash your system or compromise your data. Supporting the developers via Steam, GOG, or Itch.io ensures you get a clean, functional file and future updates.
Windows 7 or newer (64-bit), macOS 10.10+, or Ubuntu 14.04+. Download Kingdoms and Castles v120r3
If you need a specific older version (like v120r3) and it is no longer the "Live" version, check the tab under Properties to see if the developers have made that specific build available via a drop-down menu. Avoid "free" download sites or "cracked" versions of v120r3
Intel Core 2 Duo, 2.0GHz or AMD Athlon 64 X2 6400+, 2.5GHz. Memory: 4 GB RAM. 2.5GHz. Memory: 4 GB RAM.