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.
Roblox - Reimagining the way people come together.
Botanicula - Botanicula is a point-and-click adventure game developed by Amanita Design.
Blockland - Blockland is a non-competitive multiplayer sandbox-style construction game. It's kind of like playing with legos on the internet.
Trine 2 - Trine 2 is a marvelous, Action-Adventure, Puzzle-platform, Co-op, Fantasy and Single-player video game developed and published by Frozenbyte.
Garry’s Mod - Garry’s Mod is Funny, Sandbox, Co-op, Building, FPS, Action, Single and Multiplayer video game created by Facepunch and published by Valve.