It's not really a game but if you're feeling bored and lonely, you could have a chat with Bearbot at :
He's a little stupid at the moment but the more people talk to him, the smarter he becomes. You can talk to him about anything, and he will learn and become smarter. I'm trying to get him to carry a decent conversation, so the more people that talk to him, the more he can get used to humans. He's currently at the level of intelligence as a 6 year old child.
Type your question/comment in the top box and press enter, after a few seconds Bearbot will reply.