Deflect 20 attacks.

Kill the Warrior in his Fortress.

Collect 300 Light Seeds.

Find the highest point in the world.

Complete Maelstra Barrens on any difficulty level

Destroy any Helghast APC during battle

Kill 2 Helghast at once and take your own life using a single frag grenade

Collect 200 Light Seeds.

Defeat the Alchemist without using the acrobatic attack.

Learn about the world, and Elika's history.

First Healing.

Completing the Canyon.