A 90-ball bingo game is played on 9x3 cards, meaning, the cards have three horizontal lines spread across nine columns, with each line having five numbers or a total of 15 numbers for the entire card (as opposed to 75-ball bingo, which has five horizontal lines and five columns, with the center square marked as "free"). On the first column are numbers from one to 10, the second column has numbers from 11 to 20, and so on and so forth until the ninth column, which has numbers from 81 to 90.

A regular 90-ball bingo game will have three stages, marked as One Line, Two Lines and Full House. In a One Line game, the first player who is able to completely mark a horizontal line (meaning, five numbers in a line marked) is declared the winner. In a Two Line game, the first player to completely mark two horizontal lines (meaning, 10 numbers in two lines marked) is the winner. The big prize of a 90-ball bingo game is awarded in a Full House game, where the first player who is able to completely mark all horizontal lines on his card (meaning, 15 numbers in three lines marked) is the winner. There are different prize structures for each of these games, but the biggest prizes are generally awarded for Full House winners.

As opposed to 75-ball bingo, which has many and more complicated themed patterns, 90-ball bingo is much simpler and, as such, should be the preferred game for neophytes to online bingo. The 90-ball version is also slower than the 75-ball version, although it certainly isn’t any less exciting than its 75-ball counterpart.

Perhaps the most popular online 90-ball bingo game in the world is the UK's National Bingo Game, which was legalized in 1986. In it, the same bingo game is played simultaneously in bingo halls throughout the UK, creating great excitement and drama among the players, especially when they get close to winning. The National Bingo Game continues to this day, and the prizes are immense. Studies show that the National Bingo Game is the second largest computer controlled game in the UK, trailing only the National Lottery.

At the moment, the UK is in the midst of an online bingo boom that started in 2005. Online bingo is now the number one leisure activity in the UK for women between the ages of 20 and 25. And the fascination with online bingo has not been restricted to women only as a lot of men also indulge regularly in online bingo.