HyperRogue is coming soon to Steam!
The gameplay is exactly the same as in the free version (and it will stay so), but you get access to
and the convenience of Steam.
Last but not least, you also support the development of HyperRogue :)
All for a very low price (under 1 USD).
At first, HyperRogue on Steam is going to be available for Windows and Linux—I am planning to work on the OSX version later.