The Billy on Aire slot machine from Amatic is a unique and exciting game. – https://free-slots.games/amatic/billy-on-aire/. It is devoted to the life of the city of Chicago at a time when there was a big increase in organized crime. There are 40 paylines and they are fixed in this casino game. There is a risk game where you can get the biggest win by increasing your winnings by two or four times. The free slot has an original plot, which makes the game very popular.