The Black Boxes Game includes these grammar topics : have got/has got, can, to be, demonstrative pronouns, possessive adjectives, present simple, prepositions of time, some/any, much/many, present continuous, comparative and superlative adjectives, past simple, be going to, Wh-questions. 

You can also help your students with extra worksheets on these grammar topics after the game. If they forget or don't understand some of these topics, the worksheets will be very useful for them to practice.