I remember reading posts here years ago while folks were playing the game - it was released in 2006.
You can find the game here.
When you purchase the game, you will receive The Elder Scrolls: Arena and The Elder Scrolls: Daggerfall for free.
This version also includes the following:
NOTE: This version includes various small fixes, including: proper V-sync functionality, a fix for the triangle raindrops on AMD cards, and a custom-made fix provided by user Guzz, which allows the invisible sorcerers on the reef to appear properly, plus restores skybox rendering.