In order to win a round of Who Wants To Be a Millionaire, you must first beat your opponent. The number of questions required to beat your opponent will depend on their level of skill in the game.
Once you've beat your opponent, you will achieve a Milestone. If you answer a few more questions you'll reach the next one soon after!
Answering a question incorrectly will end the game immediately and drop you down to the step where you've beaten your opponent. You'll need to answer 15 questions correctly to win the top reward!
Tip: You can use the option to Walk Away to your advantage!