There are no cheats for LOTR:Conquest. The only form of help i can give are the unlockables and Xbox achievements.


Unlockables
The following game play modes can be unlocked by completing the game on the listed difficulty.

Unlock Evil Campaign
Complete the Good campaign on any difficulty.

Unlock Legendary Difficulty
Complete the campaign on Heroic difficulty.

Achievements
The following achievements can be unlocked in The Lord of the Rings: Conquest video game on the Xbox 360 console. To unlock an achievement simply complete the indicated task.

A Knife in the Dark - 15 points.
Use the scout to backstab 10 enemies in one life.

A Red Sun Rises - 50 points.
Kill 30 enemies in a ranked Team Deathmatch match.

A Storm is Coming - 20 points.
Kill 15 players with the Mage's lightning in any ranked match.

All's Well as Ends Better - 35 points.
Complete the Black Gate level in the single player War of the Ring Campaign.

Assassin - 20 points.
Backstab 10 players as the scout in any ranked match.

Assault on Minas Morgul - 25 points.
Complete the Minas Morgul level in the single player War of the Ring Campaign.

Assault on Mount Doom - 25 points.
Complete the Mount Doom level in the single player Rise of Sauron Campaign.

Assault on Osgiliath - 25 points.
Complete the Osgiliath level in the single player War of the Ring Campaign.

Battle of Helm’s Deep - 25 points.
Complete the Helm’s Deep level in the single player War of the Ring Campaign.

Battle of Pelennor Fields - 25 points.
Complete the Pelennor Fields level in the single player War of the Ring Campaign.

Battle of Weathertop - 25 points.
Complete the Weathertop level in the single player Rise of Sauron Campaign.

Blade That Was Broken - 15 points.
Score 30 hits on the combo counter as the warrior.

Blademaster - 20 points.
Kill 25 players as the warrior in any ranked match.

Conquer over Isengard - 25 points.
Complete the Isengard level in the single player War of the Ring Campaign.

Eagle Eyes - 15 points.
Get 25 headshot kills in one life as the archer.

Fall of Minas Tirith - 25 points.
Complete the Minas Tirith level in the single player Rise of Sauron Campaign.

Fellowship of the Ring - 10 points.
Complete a campaign level cooperatively.

Fire and Slaughter - 15 points.
Kill 25 enemies in one life with the scout's bombs.

Flame of Anor - 15 points.
Kill 100 enemies in one life with the mage's fire wall.

House of Healing - 15 points.
Heal 30 allies in one life as the mage.

I Will Take It - 15 points.
Capture a ring with Frodo in a ranked Capture the Ring match.

Lord of Mordor - 15 points.
Defeat Gandalf as Sauron in the Shire [Rise of Sauron Campaign]

Lord of the Nine Riders - 15 points.
Kill 10 players in one life as the Witch King in any ranked match.

Marksman - 20 points.
Headshot kill 10 players as the archer in any ranked match.

Mithril Armor - 10 points.
Complete any campaign level without dying.

Never Toss a Dwarf - 15 points.
Defeat Gimli as the Balrog in the Mines of Moria [Rise of Sauron Campaign].

No Living Man Am I - 15 points.
Defeat the Witch King as Eowyn in Pelennor Fields [War of the Ring Campaign].

Rain of Fire - 15 points.
Kill 25 enemies in one life with the archer's fire arrows.

Razing of Rivendell - 25 points.
Complete the Rivendell level in the single player Rise of Sauron Campaign.

Return of the King - 15 points.
Defeat 3 Nazgul as Aragorn in Minas Morgul [War of the Ring Campaign].

Ride to Ruin - 50 points.
Capture 10 control points in ranked Conquest match.

Rings of Power - 50 points.
Capture 3 rings in a ranked Capture the Ring match.

Siege of Minas Tirith - 25 points.
Complete the Minas Tirith level in the single player War of the Ring Campaign.

Siege of Moria - 25 points.
Complete the Mines of Moria level in the single player Rise of Sauron Campaign.

Siege of Osgiliath - 25 points.
Complete the Osgiliath level in the single player Rise of Sauron Campaign.

Splintered Shields - 15 points.
Kill 100 enemies in one life as the warrior.

Storm and the Lightning - 50 points.
Score the most points on the winning team in any ranked online match.

Stupid Hobbitses - 10 points.
Kill 300 hobbits in the Shire in one playthrough [Rise of Sauron Campaign].

That Still Only Counts as One - 10 points.
Climb and kill an Oliphaunt.

The Land of Shadow - 35 points.
Complete the Shire level in the single player Rise of Sauron Campaign.

The Mines of Moria - 25 points.
Complete the Mines of Moria level in the single player War of the Ring Campaign.

The Way of Pain - 15 points.
Defeat Aragorn as Saruman in Weathertop [Rise of Sauron Campaign].

Unfriendly Skies - 10 points.
Get picked up by a fell beast or eagle.

War of the Last Alliance - 5 points.
Complete the training level.

You Have My Axe - 15 points.
Kill 20 enemies with Gimli in any Team Deathmatch game.

You Have My Bow - 15 points.
Kill 20 enemies with Legolas in any Team Deathmatch game.

You Shall Not Pass! - 15 points.
Defeat the Balrog as Gandalf in the Mines of Moria [War of the Ring Campaign].