Take a look at the dual-reality gameplay of The Medium in the first official walkthrough demo. Two fully-fledged and visually distinct worlds - rendered and displayed simultaneously.
Discover a dark mystery only a medium can solve. Explore the physical world and the spirit world simultaneously, and use the interactions between them to solve dual-reality puzzles, unlock new paths, and awaken memories of past events.
https://store.steampowered.com/app/1293160/The_Medium/