Standing in the middle of the Pavilion at the Louisville Arcade Expo, surrounded by dozens of classic arcade games and pinball machines, your senses are overwhelmed with the urge to play a game. The lights from the machines cast a flickering glow across the room, and as you walk around the pavilion you occasionally pick up on a tune from a game you loved from your childhood, bringing with it a flood of warm memories of the dawning of the video game era.  Although this was only their third year, the Louisville Arcade Expo keeps getting bigger and better. For the low price of $15 for one day, and $35 for the weekend, all games were set on free to play, offering gamers of all flavors unlimited entertainment. …