Retro theme becomes more and more relevant and that is why the slots software developers created retro online slot games. Now Internet casinos offer themed slots with themes such as 80’s Disco, Rock and Roll, the Sixties and games about other retro stuff. Retro slots are very colorful and use funny symbols including old style TVs, music-recorders, and other retro home appliances, cars, smilies, musical instruments, hippy men and women.