Ogre

Towering over their tainted darkspawn kin, the massive Ogres are a rare sight on the battlefield. Traditionally, they only appear during a Blight, but some records claim that ogres have been spotted in the Deep Roads hunting alone or in small groups. At least one report by the Grey Wardens claims that an ogre was spotted alone in the Korcari Wilds in 9:19 Dragon, though it was weakened and easily dispatched. Up to a hundred of these creatures can accompany a darkspawn horde at any one time during a Blight, often using their great strength to burst through fortifications and demolish the front lines of the opposing army.

They use brute force to charge their enemies like bulls, slam the ground with their fists to shake enemies off their feet, and hurl giant rocks into the face of oncoming foes. Melee can be difficult against a giant that snatches a warrior up in one hand, crushing the life out of him or beating him into oblivion with the other hand. The nimble can try to wiggle his way free, or an ally can attempt an array of stunning blows on an ogre to free the endangered comrade.

Grey Warden lore urges caution when slaying an ogre. Unless it is ensured that they have received a major wound to the head or the heart, it is possible that they are lying dormant and will regenerate to full health within a matter of minutes. During a Blight, most Grey Wardens recommend burning all darkspawn to ashes... 'dead' ogres in particular.

Standing above even the normal Ogres are the Alpha Ogres; these monstrosities are no larger, but are far tougher, and are usually accompanied by shrieks.

Locations

 * Templar's Nightmare
 * Korcari Wilds
 * Deep Roads
 * Tower of Ishal
 * Denerim (Climax)

Skills

 * Massive Attack
 * Ram
 * Smash

Origin
Ogres are born from Broodmothers who were once female qunari. This suggests that ogres are a recent addition to the ranks of the darkspawn; qunari are newcomers to Thedas.

Trivia
When the killing blow to an ogre is from a melee attack there will usually be a special death animation.

Strategy
A fight against an Ogre is a daunting task; especially at the earlier levels when you do not have a lot of latitude in terms of skill selection.

The most effective strategy against the Ogres relies on the use of debuffs, such as the Death Hex and the Misdirection Hex from the Entropy school of spells, so make sure you have at least one mage in your party before facing one of these monstrosities. The Death Hex will turn every successful melee attack against the Ogre into a critical hit and the Misdirection Hex will cause the Ogre to miss in almost every swing.

Telekinetic weapons also make the fight easier because they counter the Ogre's high armor value.

The same strategy applies to Revenants as well.

Reference
Dragon Age: Journeys