buy Ostriv Alpha to support the developer, but keep in mind that the game is still in development

You get a downloadable DRM-free copy of the game and life-long subscription for all future updates, including a Steam/GOG key.
(Powered by Humble Bundle)
Make sure to enter email address correctly, you’ll get a download link on it!
You can then download new versions with the same link.

You can also get the game on GOG and Steam

system requirements

The current release targets Microsoft Windows OS (Windows 7 or newer), with Linux and Mac on the roadmap. You will need a multi-core processor and a powerful gaming video card that supports OpenGL 4.3+ to play Ostriv. GTX 770 or better is recommended. Integrated Intel video cards are not currently fully supported. Some Radeon cards may experience reduced performance at this point.