You carry an instant camera. Anything you photograph can be put back into the scene as solid geometry, which means a picture of a bridge is a bridge.

Not only photographs

Paintings, sketches, screenshots and postcards work the same way. Half the pleasure is realising a puzzle can be solved with something lying on a desk nearby.

Hub worlds with their own rules

Several connected areas that look alike and behave differently. The game teaches by letting you experiment rather than by explaining anything.

As much as you want

The story goes as deep as you choose to dig, and there is a rewind for when an experiment goes wrong. Generous throughout, and never punishing.