This is a Sonic the Hedgehog version of the classic "match the pairs of hidden pictures" memory game.

There are 80 Sonic picture cards (so that's 40 pairs of pictures to match) comprising 10 different Sonic characters, each appearing 8 times in the 10 x 8 game grid. Successfully matching pairs of the picture cards will slowly reveal a much larger random bonus Sonic picture in the game grid. There are 3 different "level" themes to choose from, each one featuring a different piece of background music from 3 classic levels of the first ever Sonic game that appeared on the Sega Mega Drive/Genesis in 1991.