The Elder Scrolls IV: Oblivion
You awake in a prison cell… Across from you is a Dark Elf running his mouth that your gonna die in here. After he speaks some of the guards walk down the stairs with the Emperor of Tamriel. They approach your jail cell and say for you to stay away from the Emperor as you make your way to a nearby window the Emperor approaches you and explains how you were seen in his dreams. He commands you to follow them into the sewers as help for protection. As you make your way through the sewers they abandon you and you take a side entrance into a dark cave…
As you make your way through cave you come across a door witch you then see the guards and the Emperor walking through the tunnels you drop down a ledge and almost instantly more Mythic Dawn Assassins attack, once you reach a safe spot the emperor then explains you were born under the sign of the Mage. When the guards are finishing up the battle you leave the room and follow the path when you reach your destination you discover it's a trap door, the Emperor already knows he's going to die so he gives you the Amulet of the Kings… and out of no-where another Assassin appears and kills the Emperor. The guards then leave you to escape the Imperial Sewers…
Fighting your way through the concluding sewers you end up almost dying by a goblin attack once you finish with them you find your way to a locked gate where you then have to search for a key, once you find it in a treasure chest you exit the sewers and see your first glimpse of light in years…