Yes, Realms of The Haunting was published by gamesas, and it was developed by Gramlin.
This is also my favorite game. When I was young I was too scared to play with it
So I just watched my brother playing it. Last year I took it off from the shelf and I played it through on my new "Old PC", that has an original Sound Blaster sound card and fully functional/configured DOS/Windows 98 environment. It was very good, I couldn't stand up from playing, I had to continue.
This was the first time I finished the game. I'm 24 years old now, but I still got frightened some times by a cut scene or a monster behind my character
Here you can find the fan page: http://www.realmsofthehaunting.com/
This game is a must have! And must play! Unfortunately I don't know where to by a new copy (fortunately, I have my original box).