"The voice in Dear Esther doesn't tell you where to go – it only reads, at set moments, from a random selection of letters to Esther as you wander over a deserted and increasingly disrupted Scottish island. The letters are randomised, so no playthrough is the same, and a fragmented narrative of a car crash, a grieving man and a stolen library book is glimpsed but never resolved. When I asked Pinchbeck whether this strictly constitutes a game, he said that it was a game engine, a nice distinction in both senses." Dan fills in his Wired piece on Dan Pinchbeck with some supplementary material. It is very good.