Ren'Py is a free, 2D, and cross-platform engine that helps you make story-based games including visual novels and simulation games. It uses a scripting language based on Python.
The Dev Diary update for WAGAKKIWA posted at 12/30/2014. Includes info on Russina localization, breathing characters, and more.
Sunrider: Mask of Arcadius has been released on Steam! Mask of Arcadius is a free content update to Sunrider which adds hours of new story and gameplay.