The Stanley Parable - The Stanley Parable is an Action, First-person Perspective, Puzzle-Platform, Exploration and Single-player video game created and published by Galactic Cafe.
Kenshō - A puzzle adventure through nature, time and space
Portal - Financial Aid Award Letter, - Messages and Calendar, - Grades.
Limbo - “Dark, disturbing, yet eerily beautiful, Limbo is a world that deserves to be explored.” Joystiq. “Limbo is as close to perfect at what it does as a game can get.” Destructoid. Buy LIMBO: Special Edition.
The Talos Principle - Philosophical first-person puzzle game.
Machinarium - Machinarium is independent puzzle / adventure game by Amanita Design