There are very few games like 13 Sentinels: Aegis Rim. It's not just because of its gorgeous artwork and mind-bending storyline. 13 Sentinels: Aegis Rim has a unique structure. Not only does the player jump between two very different gameplay modes, but the story is presented out of chronological order, through the eyes of the 13 titular sentinel pilots, with the player choosing who to follow next.