To conquer space, it is not enough to build a spaceport and simply land on a neighboring planet. In Space Empires IV, you will compete for available systems with other civilizations that are eager to gain dominance over the Universe.
The key is activated in Steam.
How to activate the key and start playing:
1. If you do not have the Steam client installed, download and install it.
2. Log in to your Steam account or register a new one if you do not have one yet.
3. To activate the key, select "Activate on Steam..." in
the "Games" or "Add game" section in the lower left corner of the application and
select "Activate on Steam..." there.
4. Enter the received activation key.
5. After that, the game will appear in the "Library" section, and you can download it.