Who Wants To Be A Millionaire?

To rack up seconds on the timer, you will need to answer the early questions in a game pretty quickly in order to "bank" the remaining time on the clock for the final question. Make it through each question as quickly as you can to save up 150 seconds of time. If you have enough time saved up when you get to the 1,000,000 question, you will be awarded with this achievement.

I unlocked this achievement in the family mode attempting to get the questions answered correctly achievement. There is no timer in this mode but the achievement was awarded on the first character I reached the final question with.