Up to four hippos share one inflatable raft, and the only way to move it is to toot. Each hippo pushes the raft away from its own butt, so the crew has to agree on where to go. A free party game for your browser on phone and laptop, with no download and no sign-up: play solo, on the couch with up to four on one screen, online with friends by sending a link, or race up to four rafts and 16 players down eight rivers.