Below is a list of Somnium: Lost in Dreams' canon events from the various games in the Dragon Age series.

DRAGON AGE: ORIGINS

Aedan Reginald Cousland is the Hero of Ferelden.

Redcliffe: The village was defended. The Warden sought out the Circle of Magi for help regarding Connor.

Circle of Magi: The Warden sided with the templars.

Orzammar: The Warden supported Bhelen. The Anvil of the Void was destroyed.

Brecilian Forest: The Warden sided with the werewolves.

Landsmeet: Loghain was executed (unless someone wishes to play him). Alistair was made king, and Anora was at least imprisoned, if not executed.

Dark Ritual: The Warden performed it with Morrigan.

DRAGON AGE: ORIGINS - AWAKENING

The Warden chose to protect the farmlands. Vigil's Keep stood well on its own. Amaranthine was defended. The Architect was spared.

DRAGON AGE 2

Marian Hawke is the Champion of Kirkwall.

Act I: Hawke took Carver into the Deep Roads but left Bethany behind. This resulted in Carver as a Grey Warden recruit and Bethany as a Circle mage. While in the Deep Roads, Hawke sided against the Rock Wraith.

Act II: Isabela stole the Tome of Koslun and vanished. When she returned to help, Hawke battled the Arishok to defend her.

Act III: Hawke helped Anders with the sela petrae quest. Hawke accompanied Merrill on her quest to deal with the demon and then appeased the Dalish clan by agreeing to take Merrill away. In the final battle, Hawke sided with the mages.