The lovely folks at Klei Entertainment have been responsible for many chunks of gaming goodness these past few years. From Don’t Starve to Mark of the Ninja to Invisible, Inc., they’ve established themselves as a formidable force in the huge sea of game development companies. To celebrate their 10th anniversary, they’re letting you play their entire catalogue, with DLC, on Steam this weekend. All for free. This is running concurrent with a sale on all the company’s titles, with up to 80% off on certain items. Head on over to the promotion’s Steam page and see what you can get your hands on.