This is a list of the main quests in Skyrim:
Unbound
Before the Storm
Bleak Falls Barrow
Dragon Rising
The Way of the Voice
The Horn of Jurgen Windcaller
A Blade in the Dark
Diplomatic Immunity
A Cornered Rat
Alduin's Wall
The Throat of the World
Elder Knowledge
Alduin's Bane
The Fallen
Paarthurnax
Seasons Unending
The World-Eater's Eyrie
Sovngarde
Dragonslayer