Minecraft
Say what you want about this game, but there is no denying that it is a major hit. Millions of people all over the world play this game every day on pretty much any device that can connect to the internet. Its very simple but highly addictive gameplay is easy to fall for. A game built around your creativity that provides you complete freedom to play your way is great. What makes it even better is online co-op.
Do you want to go out and fight for every single resource so you and your friends could build an amazing home and/or base in survival mode? Go right ahead. Or perhaps you want to play something created by another player, but maybe you don’t want to go against nature and risk your life. There is a creative mode that allows for you and friends to make pretty much anything your pretty little mind can dream up. Building fantastical worlds from your favorite fictional universes or just making up something on the spot can draw hours of your time. Have friends from all over the real world contribute to your made up one.
It’s amazing how a game made up of different colored blocks can provide such an amazing online co-op experience.