For some reason, everyone loves collecting things that are smaller than they are. We're not so much interesting in gathering buildings as we are looking at them, but if buildings were pint-sized, you can bet they'd fill our pockets like lint-covered jellybeans. Tasty Planet: Back for Seconds plays on this compulsion and puts you in control of a blob of gray goo that can eat anything smaller than it is. As you can guess, this is a dangerous thing to let loose on the Earth, but give it a time machine and all of the past and future could be in quite a pickle.