Here is the full list of all 69 Dragon Age Inquisition achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
End the threat once and for all.
Recruit a powerful ally to even the score.
Commit to a romantic relationship.
Reach an ancient ruin before your enemies.
Become friends with at least three of your inner circle in one playthrough.
Completely upgrade one throne.
Slay 10 high dragons in single-player mode.
Enter the heart of the Solasan temple.
Impress the Avvar of Stone-Bear Hold and gain their friendship.
Dispel a myth of ancient days.
Destroy all the Winter Shards and light all the fires in the Old Temple.
Uncover the secrets of a legendary figure.
End the earthquakes threatening the surface.
Help Shaper Valta discover secret dwarven history.
Earn 50,000 or more gold across all single-player playthroughs.
Complete a mission at the expedition table in the Legion of the Dead camp.
Face your fears in the Fade.
Choose a specialization class.
Unlock 15 astrariums in a single playthrough.
Defeat 1,000 demons in single-player mode.
Seal 75 rifts in a single playthrough.
Reach level 20 in single-player mode.
Liberate three keeps in a single playthrough.
Defeat 2,500 enemies in single-player mode.
Acquire 10 Inquisition agents in a single playthrough.
Complete 20 requisition requests in a single playthrough.
Defeat an ogre alpha.
Complete 50 missions or operations in a single playthrough.
Discover a campsite and establish at least one Inquisition camp in 10 wilderness areas.
Purchase or secure five different mounts of any kind.
Kill a high dragon in single-player mode.
Level up the Inquisition to rank 10.
Make an impression on the Orlesian court.
Survive an attack on the Inquisition.
Recruit all possible companions in a single playthrough.
Collect 250 codex entries in a single playthrough.
Land a single blow in excess of 1,000 damage in single-player mode.
Close the Breach.
Spend 10 points in a single ability tree with any one single-player character.
Craft a weapon or piece of armor in single-player mode.
Enchant or upgrade a piece of equipment in single-player mode.
Discover a veilfire rune.
Recruit a new companion.
Gain access to a major city for the Inquisition.
Secure a mount.
Complete a timed mission on the war table.
Trigger a cross-class combo with a character you control in single-player mode.
Find and recover a shard identified by an ocularum.
Upgrade any ability once in single-player mode.
Discover a campsite and establish an Inquisition camp in any wilderness area.
Finish the prologue.
Harvest 50 herbs from Skyhold's garden in a single playthrough.
Purchase any new decoration element for Skyhold.
Gain the full approval of the Orlesian court.
Craft an item from Tier 4 materials in all non-masterwork slots in single-player mode.
Upgrade your alchemic potions, grenades, or tonics 30 times in a single playthrough.
Finish the single-player campaign on at least Hard without lowering the difficulty.
Finish the single-player campaign on Nightmare without lowering the difficulty.
Slay 10 great bears promoted by Grizzly End.
Rest Easy trial always on in Emprise du Lion: claim Suledin Keep.
Travel Light on for "In Hushed Whispers": finish the quest.
Rub Some Dirt on It on: slay the Hivernal high dragon.
Defeat 20 foes promoted by Walk Softly.
Even Ground on: slay a level 16 or higher Fereldan Frostback.
Take It Slow on: reach Skyhold at level 5 or less.
Fair-Weather Friends always on: enter Halamshiral with all followers.
Progress the story to unlock.
Unlock all caches watched over by ancient statues.
Find all of the wearable items that make up the Taken Shape.