Machinika: Museum is free to claim on the Steam store for a limited time, you have up until May 27 at 10am PDT to claim the game to keep in your library forever!
Machinika: Museum is described as:
Machinika Museum invites you to discover and solve puzzles rich in mystery! An original adventure combining hidden objects and an intriguing story inspired by the excellent old school puzzle game Myst and the more recent The Room and The House of Da Vinci.
In a distant future, finding machines from alien civilizations is not unusual, especially in a museum dedicated to them. Your job is to receive these devices and to understand how to repair them.
Be sure to pick it up from the store here