There's now a Water Realm walkthrough on Psycho Circus World, the first part of their Secrets Guide which will ultimately add guides to the Earth Realm, Air Realm, and Fire Realm to offer a complete guide to KISS Psycho Circus: The Nightmare Child. Also, the Deus-Ex.Org Deus Ex Walkthrough is online, helping you make your way through the first mission their namesake game (which also happens to be a walkthrough for the demo), and in a semi-related note, this page offers information on how to benchmark Deus Ex, as well as a demo to use for the process. The article is in German, but includes its own helpful English translation.