(GB) Dr. Mario

After the global success of Tetris on Gameboy Nintendo couldn’t miss the chance to make its own addictive puzzle games, so thanks to Gunpey Yokoi, already father of Game Boy, they produced Dr. Mario, a puzzle game similar to Tetris featuring Mario obviously and released in 1990, the same day of Famicom version.
The game is basically the same from the 8 bit home console except for the monochrome graphics, there is also support for multiplayer thanks to the GB Link Cable.
Needless to say that the portable version was a great success in term of sales.