Discovery Tour: Viking Age

You unlock all the entries in the database by finishing the story related missions and exploring the map, walk towards the yellow icons and interact with them. If you explore beforehand, you'll unlock this on the final mission

Here's a list of the 25 entries required for this achievement.

- The Legendary Brothers
- Divinities of the Sea
- Taboos on the High Seas
- Yggdrasil: The World Tree
- Giants: Children of Ymir
- The Sacred Mead of Peotry
- The Well of Mimir
- The Nine Realms
- The Goddess Freyja
- Across the Rainbow Bridge
- The Völva: A Soothsayer
- The Elk, or Elgr
- The Snake, or Ormr
- The Horse, or Hestr
- The Sea: A Spiritual Being
- Mystery of the Shore
- Animal Taboos
- Thor, God of Thunder
- Loki, the Trickster
- A sacrifica for Wisdom
- Odin: The All-father
- Lands of the Dead
- The Iron Will of Fate
- Lands of the Dead II
- The Norns: Keepers of Fate