Register an account on the Electronic Arts web site which is linked to your profile in Dragon Age: Origins and then play the Dragon Age Journeys mini-game at www.dragonagejourneys.com . Doing this will enable you to unlock the following bonus items in Dragon Age: Origins by completing the corresponding task.
Unlock Amulet Of the War Mage: Sign in to your EA account in Dragon Age Journeys.
Unlock Embri's Many Pockets: Save the Grey Warden Martine by completing The Missing Warden quest.
Unlock Helm Of The Deep: Unlock ALL 5 Achievements in Dragon Age Journeys: The Deep Roads.
This is an easy merchant trick that allows you to quickly make lots of gold. To do it enter the trade window with any merchant. Then click (and hold) an item in your inventory. While still holding down the Left mouse button press and hold the Right mouse button. Now, drag the item over to the merchant's inventory while still holding down both Left and Right mouse buttons. When you now let go of both mouse buttons simultaneously you will notice that the item will sell for 2x the normal selling price. If you now buy the item back from the merchant for 1x the normal price you will make a profit. Performing this trick is an easy way to get lots of Gold early which will allow you to buy ALL the skill/stat books and the best equipment much earlier in the game.
Create a shortcut to your desktop of 'daorigins.exe' (Dragon Age/bin_ship/daorigins.exe). Then go to 'Shortcut Properties' and under 'Target' add '-enabledeveloperconsole' (without the quotes) after 'Dragon Age/bin_ship/daorigins.exe'.
On the Steam version this can be done by right clicking on the game in your Games List, selecting 'Properties' and clicking 'Set Launch Options'. This will allow you to enter command line option.
Locate the 'keybindings.ini' file in the 'My DocumentsBioWareDragon AgeSettings' and find the line 'OpenConsole_0=Keyboard::Button_X' (GRAVE is default, change X to any button that is not already used in the game.)
Save the file, and start the game with the 'Dragon Age/bin_ship/daorigins.exe' shortcut you created on your desktop.
During the game press the key that you chose (Keyboard::Button_X) and then type the following codes (without the quotes). These codes have only been tested on the retail version of the game so may not work on the Steam version. Don't worry if you do not see the console or what you are typing as this is normal.
God Mode: Type 'runscript pc_immortal' (You will still take damage, but will not die.)
Adds Experience Points to Party: Type 'runscript addxp' (number here, some work some don't)
Adds X Ammount of Experience: Type 'runscript addxp X'
Brings up the Enchantment Menu: Type 'runscript zz_upgrade'
Kills All Hostiles: Type 'runscript killallhostiles'
Removes ALL Injuries from Party: Type 'runscript injury remparty'
Find a merchant that sells a book that unlocks a class and save the game. Then sell enough of your items to get the required amount of gold to buy the book. The class will become unlocked for ALL your characters when you purchase the book and when you then load your save game you will have the class unlocked along with everything from the saved game before you sold them to get the book.
To get Experience points early in the game go to the city of Denerim as soon as you leave Lothering and search for a building named 'Wonders of Thedas'. When you have found it go inside and purchase the Archivist's Belt and when you equip it you will get an Experience point boost for everything in your Codex. Books for example will increase from 50 Experience points to 75 Experience points.
At the end of the 'Target' field in the 'Shortcut' properties that are used to launch the game add the '-enabledeveloperconsole' command line parameter. Then press the ~ (tilde) key during the game to display the console window and enter one of the following codes to activate the corresponding effect. You will not be able to view what is being typed and you will need to press the 'Backspace' key to remove unwanted characters.
Add Indicated Amount Of Experience Points: Runscript addxp (number)
Add Indicated Amount Of Copper: Runscript zz_money (number)
Cannot Die: Runscript pc_immortal
Add Party Member: Runscript zz_addparty (NPC name)
Add To Companion Approval Rating: Runscript zz_addapproval (companion) (number)
Break The Party Companion Limit: Runscript zz_addparty
Add Talent Or Spell To Your Character: Runscript addtalent (number)
Heals Player Or Party: Runscript healplayer
Kill All Enemies In Area: Runscript killallhostiles
Knock Back Enemies And Form A Shield Around You: Runscript bowlingforferelden
Removes Indicated Talent From Character Personal Profile: Runscript removetalent (talent number)
Origin Screen: Runscript chargen
Party Select Screen: Runscript selectparty
Remove Entire Party: Runscript zz_dropparty
Talk To Nearest NPC: Runscript zz_talk_nearest
Teleport To Duncan's Fire In Ostagar: Runscript zz_pre_strategy