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About Sierra 9
You’re the chosen one, save humanity from the evil aliens and their leaders!
For decades, the struggle for the blessing of the space monsters has been going on, but has not yet succeeded. You are a part of humanity that’s on its last legs against its opponents, the aliens. You are the only hope to save your planet and thus must travel through space to fight and defeat the leaders of
the space creatures. It’s not until they are defeated that Earth and space can have peace between each other.
What's new in the latest 1.0
Last updated on Jun 2, 2021
Minor bug fixes and improvements. Install or update to the newest version to check it out!
Gameplay and Screenshots
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