The Endless Forest is a multiplayer online game and social screensaver, a virtual place where you can play with your friends. When your computer goes to sleep you appear as a deer in this magical place. There are no goals to achieve or rules to follow. Just run through the forest and see what happens.
Although not goal-oriented, there are several activities that you can engage in. Nothing very demanding or violent. Just fun things to do in a nice environment.
Once every so often, the forest deities will appear, either in person or through their divine powers. Beware of falling rocks and sudden showers!