Multi-format Castle Storm

Developed by Zen Studios
Available on iOS, Microsoft Windows, PlayStation 3, PlayStation 4,
PlayStation Vita, Wii U, Xbox 360, Xbox One

Long ago (the game states it to be around a century), two mighty armies
the southern Kingdom and the northern Vikingland -battled for an
unknown reason. Overseeing the battle, the Peace Goddess wept at the
needless destruction. Her tears fell (with rather thunderous sound) in the
form of two gems—one blue, one red.