the games I like on alexa are:

volley trivia showdown (a true or false game you play with other alexa users)

volley daily trivia (like showdown, but daily, and you play by yourself)

question of the day and today's question (what they say on the tin, daily questions to test your skills)

harry potter quiz (play to win points for your house)

wizard of oz (interactive game based on the book)

what's my name (fun guessing game with alexa, with lots of categories to choose from)

acunator (let alexa read your mind)

merlin's quest (short fun quest)

magic door (random outcomes depending on the path you choose)

probably others

but these are my absolute must plays every day