Siliconera: In terms of theme, Clock Zero Portable is really a unusual otome game. In fact, it’s even kind of weird for a general visual novel. Let me just be blunt, Clock Zero is a sci-fi, post apocolyptic, romantic adventure that also gets into both time travel and the idea of parallel universes. Needless to say, things can get a little complicated, though everything starts out relatively simple. Oh, and there’s a talking bunny keychain and consulting it also has an affect on which endings you can get with which characters. It’s also fairly language-intensive, so you have to know exactly what you’re reading to play.