This is a revision game called MegaBrain, which encourages students to teach each other concepts. Students have a set time limit to study the concept in teams, and select their representative to answer questions out the front. There are two variations included in the powerpoint, with full instructions on how to play and customise the game. My students love playing this - it gets very intense! The game has a ten, five and two minute timer preset, but you can customise your own time following the instructions provided.
Due to the advanced functionality in this game, unfortunately it can only be provided in .pptx format.