To celebrate, Rabi-Ribi and the UPRPRC version is 20% off.
As an extra bonus, the OST and Artbook are 30% off for those who missed out on getting UPRPRC version!
http://store.steampowered.com/app/431620/
http://store.steampowered.com/app/431621/
http://store.steampowered.com/app/400910/