…downloadable and/or playable directly in the browser.
…Atheism is the lack of belief in any god or gods. That’s it. While this should be obvious, many people seem to think it implies other things. It doesn’t. The only generalization you can make about all atheists is that they don’t believe in any gods.
The term atheism often invites misconceptions. Unlike a typical -ism, atheism does not refer to a particular positive ideology, and there is no school of thought behind it. It is used as a blanket term to refer merely to the absence of something others may happen to have. To be very clear, atheism is not a philosophy or a movement.