The next link, you can download the last project and walk yourself like a game, but with space architecture Archviz so realistic materials and lighting.
If say some dll missing, should to download Directx Redistributable, and load again.
http://www.microsoft.com/en-us/download/details.aspx?id=8109 (Download)
I’ll hope that you are interesing in this type of project.
Working by innovation.
Thanks.