The capabilities and possibilities of emerging game-based learning technologies bring about a new perspective of learning and instruction. This, in turn, necessitates alternative ways to assess the kinds of learning that is taking place in the virtual worlds or informal settings. accordingly, aligning learning and assessment is the core for creating a favorable and effective learning environment. The edited volume will cover the current state of research, methodology, assessment, and technology of game-based learning. There will be contributions from international distinguished researchers which will present innovative work in the areas of educational psychology, educational diagnostics, educational technology, and learning sciences. The edited volume will be divided into four major parts.