From the website:
What if everyone you know, loved, and remembered are just complex simulations in a computer-generated universe? What if you began to see through the shroud that separates what you think is your life from what is real? What if you wake up from this simulation, only to wonder if you are in another?
With multiple play modes for competitive, solo, or even cooperative play, what happens next is completely up to you. You can play the game in the standard Classic mode, the more complex Challenge mode, or the stretch goal based Adventure mode, which will allow you to match wits against a litany of enemies. Compete with your friends in a race to ascend to the ultimate reality! Choose cooperative play to collaborate with your rivals or plot each others’ downfall. Or go solo and practice your skills at breaking out of the simulation.
The base game will include 3 realities, each with 5 unique characters. A 6th character per reality will be available as a stretch goal. Each of these characters has their own strengths and weakness plus a unique backstory which has a real impact in the Adventure mode.