10 Video Games You Didn't Realise Were VERY Successful

The Tetris craze was in full-swing during the early 90s, inspiring gaming studios to forge their own Tetris clones, hoping to generate a ton of cash. Over the years, we've had many rip-offs of the iconic Game Boy title, such as Columns, Dr. Robotnik's Mean Bean Machine, and Super Puzzle Fighter.

Of course, the most well-known Tetris doppelgänger has to be Dr. Mario. Throughout this puzzle game, the Italian plumber tosses vitamin capsules into a bottle to align the same colours, in order to destroy the nasty viruses.

Although Dr. Mario is addictive and has incredibly catchy tunes, it's surprising to see Nintendo plagiarise another property so flagrantly. (C'mon, guys. You wrote the book on innovation.) Because Dr. Mario was blatantly created to piggyback off the success of Tetris, you'd assume gamers would see through it and stick to the original.

But that wasn't the case. Dr. Mario was a blinding success, selling ten million units. In fact, it outdid some mainstream Mario titles by a considerable amount. It sold double the amount of Super Mario Sunshine and Super Mario World 2: Yoshi's Island. Even though Super Mario Galaxy 2 is hailed as a masterpiece, Dr. Mario has it beat by three million copies.