In the past two or three years, I've played TANKI ONLINE more than any other video game. Beware, as it is simple yet addictive. You're a tank trying to destroy other tanks, sometimes with another objective like capturing a flag, points or assault. Each game takes about six minutes, so I can take breaks from work throughout the day to play a game here and there (what would have used to be my smoking breaks). My nephew first introduced me to this game years ago, and I started only playing in Raleigh when visiting my sister's family but eventually started playing on my own back home. It is free to play, but according to my nephew "buyers, noobs and hackers" have ruined it. I have to admit, I'm one of the buyers. For as low as around $4 you can buy a kit to make your tank more competitive but then if you play consistently and do the missions daily you don't have to pay any more $ to improve your tank, you can do it with in-game crystals you acquire and wait for sales. I just maxed out my Mammoth Thunder!