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.
Craftopia - Craftopia offers you a blend of Sandbox, Open World, and Crafting game elements, developed by Pocket Pair, Inc. The game has both Single-player and Online Co-op modes, giving you stunning gameplay to experience.
World of Goo - get it here | read the blog | forum.
Stationeers - Stationeers comes with a blend of Open World Survival, Space Exploration, and Single-player video game developed and published by RocketWerkz for PC.
A Walk in the Dark - A Walk in the Dark is one of the most addictive and quite challenging Action, Puzzle-Platform and Adventure video game that takes you on an amazing journey in the world of wonders.
Portal 2 - Portal 2 is an Action-Adventure, Science-Fiction, Puzzle Platform, First-Person, Single and Multiplayer video game created and published by Valve Corporation.