With recent advances in harnessing the knowledge and skill of large groups of (unknown) network-connected humans, researchers and practitioners have been designing systems that make contributions of users entertaining and more engaging. Game mechanics are being applied to the traditional human computation tasks, such as transcription, classification and labeling. Seminal examples of such applications include ESP game and FoldIt. At the same time, companies seek strategies to include elements of gaming into business processes to increase productivity and engagement of employees. Framing a business goal in the form of a game is also a promising method for motivating newer generations in the workforce.