Hidden egg bonuses
Collect the hidden eggs  that are found throughout the game to access the bonuses listed below.

1 egg: Ad for the Eragon and Eldest books
2 eggs: Edward John Speleers commentary
3 eggs: Design commentary
4 eggs: Art direction commentary
5 eggs: Birth Of A Game commentary
6 eggs: Concept art
7 eggs: Orchestra commentary
8 eggs: Saphira commentary
9 eggs: Sienna Guillory commentary
10 eggs: Character concept art
11 eggs: Concept art
12 eggs: Concept art
13 eggs: Robert Carlyle commentary
14 eggs: Sound Effects commentary
15 eggs: Garrett Hedlund commentary
16 eggs: Evolution Of Games commentary
17 eggs: Concept art
18 eggs: Throne Room bonus level

Bfeating Durza
When you get to Durza, continuously hold [Block] and use the fire move on him. But you will still have to dodge when he is going to grab you.