I know its not really the same, but Realms of The Haunting was something like Normality:).
It was just a lot less a graphic adventure and a lot more an fps but at the time i always thought of Normality when playing it:).
By the way i should check if it is on GOG already. That game was a gem.
It was developed by the same company with the graphic engine of Normailty.
ROTH is on GOG and I second your recommendation, a great game! Still have the original CDs.