Last Message Plus

Can something be so terrifying that it would drive anyone crazy just to hear about it? It all starts when someone sends you a message from your friend's cell phone, asking for help to escape from a situation as complicated as it is obscure. From the various options, choose the ones that seem most appropriate and follow the course of the story, guiding a complete stranger through underground tunnels. Pass by creatures capable of inspiring madness in the eyes of the beholder. Your choice of option...