Story
The year is... Well, you don't really know. Probably some time in the 2100s, but the year is the least of your concerns. The universe has been split in two in some unknown cataclysm.
You are an Index Company worker android with the ability to switch between the two similar, however slightly different, dimensions. You must use this ability, and many more unlocked along the way, to learn the secrets of this broken world. All that stands in your way is a malfunctioning super-AI, hell-bent on stopping you. Simple. Unfortunately, your memory has been cleared. On your journey you can find hidden data logs containing deeper lore on objects and enemies in the game, as well as further details allowing you to reconstruct a picture of what happened.
For a further challenge, or an easier experience, there are Reality Crystals hidden throughout the world which once collected, allow you to augment your gameplay experience on new saves.