Europa Universalis III: Heir to the Throne Minimum System Requirements:
OS: Windows XP/2000/Vista
Processor: 1.9Ghz Intel Pentium 4 or similar AMD
Memory: 4GB RAM
Graphics: 128MB, Vertex- and Pixelshader 2.0 support
DirectX®: DirectX 9.0c
Hard Drive: 6GB of free space
Sound: DirectX compatible soundcard

Activation on Steam

1)      Download & install the Steam client on your computer from   here.

2)      Open the Steam client, register and login. Then, locate the Games tab on the top menu. Click that and select “Activate a Product on Steam..”

       

3)      Enter your code that is showed on the orders page of eTail. Market and and follow the steps showed to activate your game.

       

4)      The game can be monitored now and you can see it on the "Library" section on Steam. You can download and install the game now.

5)      If you need more information and support, you can click here: https://help.steampowered.com/en/wizard/HelpWithSteam