The project includes a fully-developed town, an interactive player home, and a multi-path interlocking series of quests in a vast underground ruin. Over 100 fully-voiced NPCs, hundreds of custom 3D models, textures, and sounds bring a fresh experience to players of this vintage (2006) game, while remaining true to the original game's story lore. A notable feature is the use, on multiple dungeon levels, of full-custom non-tiled geometry -- important for bringing new life to a decade-old classic where players have "seen it all."
In addition to its own custom assets, Rathunas relies on thousands of community-developed models, textures, and scripts to bring the town to life. (These are credited in detail in the mod's web page and downloadable documentation.)
This project was entirely non-commercial, a labor of love by all who participated. Although released to the public in 2015, the project is still actively maintained.
Official download page: http://www.nexusmods.com/oblivion/mods/45880/?