After a satisfyingly traditional evening of watching videos of cats doing silly things on a popular video sharing website, I started to think...
While we play 'games' with our pets, generally these games involve performing a task that we can easily understand but is completely beyond the comprehension of the animal (ex: getting a cat to chase a laser pointer around the floor) or a little closer to comprehension but still enough to confuse an average animal (ex: pretending to throw for a dog, but you aren't holding anything)
There may be occasional exceptional animals who seem to understand, or at least work out a different way to react, but the vast majority would be completely oblivious of the game despite it being a completely unnatural situation.
Now imagine humans are being kept as pets by an alien we have no awareness of. This can be on any scale you find appropriate... it could be an individual alien to an individual or small number of humans, or the entire planet Earth could be a 'fish bowl'.
What games might our alien masters play with us for their own entertainment, while we remain mostly oblivious?