It sounds like fantasy, but the manipulation of dreams is now possible — and it's thanks to a well known video game, Tetris. So what does Tetris have to do with dreaming, and could companies use this to shape what we see when we sleep? Want to learn more about dreams? Check out our episode 'As real as waking life' — exploring lucid dreams. Hear our first episode about Tetris: Why people are playing Tetris to treat their trauma.