I've always enjoyed classic arcade games. From the first time I had the chance to play games in an arcade, to being able to play them online now.  Recently I came across this site that lets you play 900 games online no coins needed!

The Internet Arcade is a web based archive of arcade games emulated.  Lots of classics on here to play including, "Q-bert", "Centipede","Galaga","Frogger","Zaxxon", "Burgertime","Dig Dug" among many others.  This list also features the "Journey" game which I never got to play when I was younger.  Most of the game's you can play with your keyboard but some may not work.  Head to the site and get playing!