Reviewed article:

Robertson, J., & Howells, C. (2008). Computer game design: Opportunities for successful learning. Computers & Education, 50(2), 559-578. doi:10.1016/j.compedu.2005.11.026

From this article, I gleaned some insight on what adult (university-level) learners are looking for in a game that constitutes part of their professional education: in addition to ease of use and playability, which are essential for almost all gamers, the article suggests that professional learners seek a "meta-educational" explanation of how the game is a worthwhile part of their professional preparation, and remediation that helps them identify exactly what lessons they should draw from the gameplay.

This is a list of the ten most-cited articles on game-based learning according to the Web of Knowledge database.

The abstracts you see are also from the database. I've arranged the articles chronologically, from most-recent to least-recent. Where free versions are available online, I've included a link. If you're interested in reading any of the others, you'll either have to pay or go to a university library (either online or in person) to get a copy.