Fully upgrade a weapon

Find 5 trading cards

Shoot down a Hunter or an Eliminator while they are jump attacking in the air.

Collect all of the Books

Finish the game without saving.

Finish the game with rank S.

Obtain all keys and use them all.

Attack an enemy to save your partner who is grappling with that enemy.

Return all the Lindwyrms to Ratatoskr

Fight off the Proto Tyrant.

Complete all quests in Act IV.

Battle Heimdall

Obtain all Shields