Baby, it's cold outside. All you want to do is snuggle up in a warm sock and take a nap. But something seems to be going on in the house, and you're determined to find out what it is. Hippo on Elm Street is a short, adorable text adventure in the style of the old Infocom games. This game is based in the world of the House Hippo, a PSA by the Concerned Children's Advertisers.