xbox 360-Eragon

Full health

Pause the game, then hold LT + RT + LB + RB and press X(4), B(2). Your health will be fully restored. Repeat this as many times as desired.

Fury mode

Pause the game, then hold LT + RT + LB + RB and press X(2), B(2). Your magic will cool down faster.

Hidden Egg bonuses

Collect the indicated number of hidden Eggs found throughout the game to unlock the corresponding bonus:

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

Defeating Durza

There are two stages to fighting the evil Shade. During the first stage he will teleport around, slashing at you with his claws and shooting streams of flame. He will charge up his fire attack. When he does, run up to him and press A or B to grab him in a "full nelson" move. Keep tapping A, B, X, and Y and Brom will come over and hit him with his sword, Zar'roc. When the Shade breaks free, hit him with your sword when he gets close. Get him to half health and the second stage of the battle will begin. In the second stage he will continue to teleport around, but will also change from the fire stream attack to another. He will float in the air with a large red bubble shield around him. Many Scimitars will fly off the walls and will shoot through the air towards you. After they stop, run up and attack him.

When the final battle starts with Durza, hold L + R and shoot Fire Arrows at him on his demonic steed. When he fires purple missiles at you, release R and keep L held. Press A rapidly, and Eragon will deflect the missiles back at Durza. However, when the Shade fires Fire Balls, you cannot deflect them; just dodge them. Continue this until he is dead. There is a secret egg in this level, but it is hard to find. Look for the telltale blue dot on the screen.

Achievements

Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Daret Docks - Normal (20 points): Make it through the Daret Docks level on Normal.
Daret Docks - Hard (30 points): Make it through the Daret Docks level on Hard.
Gil'ead Keep - Normal (20 points): Make it through the Gil'ead Keep level on Normal.
Gil'ead Keep - Hard (30 points): Make it through the Gil'ead Keep level on Hard.
Trapped! - Normal (20 points): Complete the Trapped! level on Normal.
Trapped! - Hard (30 points): Complete the Trapped! level on Hard.
Ra'zac Chase - Normal (20 points): Complete the Ra'zac Chase level on Normal.
Ra'zac Chase - Hard (30 points): Complete the Ra'zac Chase level on Hard.
Daret Bridge - Normal (20 points): Make it through the Daret Bridge level on Normal.
Daret Bridge - Hard (30 points): Make it through the Daret Bridge level on Hard.
Daret Town - Normal (20 points): Make it through the Daret Town level on Normal.
Daret Town - Hard (30 points): Make it through the Daret Town level on Hard.
Carvahall - Normal (20 points): Make it through the Carvahall level on Normal.
Carvahall - Hard (30 points): Make it through the Carvahall level on Hard.
The Spine Mountains - Normal (20 points): Make it through the Spine Mountains level on Normal.
The Spine Mountains - Hard (30 points): Make it through the Spine Mountains level on Hard.
Gil'ead City - Normal (20 points): Make it through the Gil'ead City level on Normal.
Gil'ead City - Hard (30 points): Make it through the Gil'ead City level on Hard.
Durza's Fortress - Normal (20 points): Make it through the Durza's Fortress level on Normal.
Durza's Fortress - Hard (30 points): Make it through the Durza's Fortress level on Hard.
Flight From Gil'ead - Normal (20 points): You have beaten the Flight From Gil'ead level on Normal.
Flight From Gil'ead - Hard (30 points): You have beaten the Flight From Gil'ead level on Hard.
Ruins of Orthíad - Normal (20 points): You have beaten the Ruins Of Orthíad level on Normal.
Ruins of Orthíad - Hard (30 points): You have beaten the Ruins Of Orthíad level on Hard.
The Beor Mountains - Normal (20 points): Make it through the Beor Mountains level on Normal.
The Beor Mountains - Hard (30 points): Make it through the Beor Mountains level on Hard.
Urgal Encampment - Normal (20 points): Make it through the Urgal Encampment level on Normal.
Urgal Encampment - Hard (30 points): Make it through the Urgal Encampment level on Hard.
Misty Gorge - Normal (20 points): Make it through the Misty Gorge level on Normal.
Misty Gorge - Hard (30 points): Make it through the Misty Gorge level on Hard.
Urgal Attack! - Normal (20 points): You have beaten the Urgal Attack! level on Normal.
Urgal Attack! - Hard (30 points): You have beaten the Urgal Attack! level on Hard.
Defend the Varden - Normal (20 points): You have beaten the Defend The Varden level on Normal.
Defend the Varden - Hard (30 points): You have beaten the Defend The Varden level on Hard.
Final Battle - Normal (20 points): Make it through the Final Battle on Normal.
Final Battle - Hard (30 points): Make it through the Final Battle on Hard.
Explorer (100 points): Collect all the secret eggs.