Hypercountdown, derived largely from what was known as Countdown Advanced, is a variant of Countdown that was typically always played over MSN Messenger, and is now played on Apterous. It was originally invented by Gevin, and refined by Ben Wilson.
Differences with Regular Countdown
Each round of Hypercountdown is designed to be an increase in difficulty and complexity from regular Countdown. Letters games and conundrums contain 12 letters instead of 9, numbers games have 8 numbers instead of 6 (with 150 and 200 as additional large numbers), and a 4-digit target to reach. Hypercountdown is available on Apterous.