This book chapter examines the rapidly emerging field of computer-based assessment for gaming from the perspective of sound measurement principles. In educational gaming, a variety of assessment approaches are being used to make inferences about the learner. Evidence is used in some settings to drive adaptive delivery of content, score interactions and gaming products, produce a variety of reports, and, increasingly, provide information for educational decision-makers that impacts students in a variety of subject matter areas and grade levels. In this chapter, we examine innovative approaches for use of assessment evidence through gaming. The principles of the Berkeley Evaluation and Assessment Research Center Assessment System are used as a framework of analysis for these products with respect to key measurement principles. Some directions of future game development are presented, particularly for problem-solving and other complex teaching and learning settings. Suggestions are provided of promising emerging avenues for game developers.