Odin Sphere is set in Erion, a world of several large and powerful nations that hold an uneasy peace and keep each other in constant check. One day the most powerful country, Valentine, is mysteriously obliterated, sparking a war between two of the other nations, Ringford and Ragnaval. They go to war to fill the power vacuum, but what they do not realize is that their turmoil is part of a long-lost prophecy that could lead to the end of the world. As the characters play their parts, they learn how their interwoven lives can put an end to the prophecy.

Odin Sphere received a positive reception with an average critic score of 83% at Game Rankings. Play Magazine gave it a perfect review, praising its 2D graphics, detailed storyline, and unique combat system as the high points of the game.