These are all "something OF somthing" titles - that's kind of outdated at the moment (except for the Harry Potter titles and Worlds of Warcraft - but I guess that's the cause of it).
Pick a one-word title. That's also a better way to create a unique sense of what you do, when other game/media titels are mostly abbreviated - like HHGTG, WoW, WCCCG, and so on. If somebody talks about Otherland, it just sounds different.