I'll try my best by memory.
Feel free to contribute
The age of ancients
- Stone dragons and eternal trees ruled the land.
- The Lords find the great souls on the fire.
- The Furtive Pigmy finds the dark soul and gives birth to mankind.
- Gwyn and his knights team up with Nito and the Witch of Izalith to fight the dragons.
- Seath the scaleless tells Gwyn the dragon's weakness to lightning and betrays its own people.
- Seath is given the "duke" title by the winning Gwyn.
- The fire begins to fade, the Lords realize this would free the Abyss unto the world.
- The Witch of Izalith attempts to create a new primal fire and accidentaly gives birth to the Bed of Chaos and all demons.
- Gwyn sents Artorias to deal with the Abyss while he tries to link the fire.
- Artorias is corrupted by the Abyss and defeated by a time-traveling Chosen Undead.
- The Chosen Undead defeats Artorias, saves Sif and slays Kalameet.
- The Chosen Undead faces the Furtive Pigmy in the form of Manus and defeats him, instead of killing him, this splits his souls into many small pieces.
- Gwyn attempts to link the primal fire and becomes the Lord of Cinder.
- Gwynevere leaves Anor Londo which becomes surrounded in darkness.
- New Londo becomes engulfed in the Abyss, and it is flooded to stop the Abyss from spreading on Lordran.
- Gwyndolin and the serpent Frampt devise a plot to keep strong, souls-filled Undead to constantly link the fire. They fill Anor Londo with light to cover Gwynevere's abscence.
- The firekeepers die.
The dark age.
- The undead curse ravages humanity. Lordran falls.
- The undead are chased and sent to the Northern Undead Asylum.
- Frampt spills the legend of a "chosen undead" who will break the curse.
- The (or rather "a") Chosen Undead scapes the Asylum and makes his way to Lordran.
- The Chosen Undead obtains the Lord Souls and becomes powerful enough to challenge/sustitute Gwyn on the primal fire.
- The Chosen Undead links the fire / allows the fire to die and became a new age of darkness.
The modern age.
- The cicle of link fire/age of darkness is repeated at least 8 times.
- Kingdoms rise and die where Lordran stood. Now called Drangleic.
- A powerful undead king called Vendrick and his brother Aldia, figure out that to break the curse, an undead must harness the dark and control the fire. To do so, he needs the magical crowns. Vendrick figures out he is not the one who will break the curse, but set his way to make sure that when the correct undead comes, he finds an easier path.
- Aldia begins to experiment to resurrect the dragons, since they were ageless and Aldia thinks they are the key to break the curse.
- Vendrick travels to the sunken city of Shulva and finds the crown, but leaves it for a future undead to pick up.
- A beautiful woman called Nashandra enters Drangleic and Vendrick falls in love with her.
- The undead curse returns in strenght with Nashandra.
- Nashandra convinces Vendrick that the way to stop this, is to steal the Giant's treasure.
- Vendrick crosses the seas and steals the treasure, the Giants declare war on Drangleic.
- The Giants invade and destroy Drangleic, ravaged by war and the undead curse, Drangleic is on the verge of falling when a misterious figure (a time traveling Bearer of the Curse) appears and defeats the Giant King. Still is too late for Drangleic and the kingdom falls in ruin.
- Vendrick discovers that Nashandra is in fact a piece of Manus' soul, and puts into motion a plan to stop her from claiming the throne (which is set on the place of the primal fire).
- Vendrick hides his armor and crown on a place that only a Human can unlock, and with the last of his will, ask his right hand man Velstad to guard over him until the correct undead comes.
- The ancient Chaos resurfaces on Eleum Loyce as another of Manus's soul pieces called Alsanna enters the kingdom.
- Eleum Loyce's King and his knights valiantly stood on the way of Chaos to stop it from spreading.
- Aldia creates Shanalotte the Emerald Herald but figures out this is not the way to break the curse.
- Shanalotte becomes the last firekeeper.
- Many undead are called by instinct to Drangleic.
- The Bearer of the Curse arrives to Drangleic and Shanalotte recognizes him/her as the new monarch.
- The Bearer of the Curse defeats the Great Lord's reincarnation and becomes worthy of finding Vendrick's legacy.
- The Bearer of the Curse defeats Nashandra and Aldia and speaks with Vendrick's memory.
- The Bearer of the Curse sets his/her way to defeat all Manus' soul fragments and recover the lost crowns.
- The Bearer of the Curse finds all the crowns and succesfully breaks the curse becoming an inmortal dark king on a dying world.
There are a LOT more of events, but I'm at work!