Here is the complete list of unlockable achievements for Dungeon Siege 3 on the Xbox 360, with the secret achievements listed at the bottom in their own section.
Archambaud’s Anathema (20) – During your fight against the Dapper Old Gent, you destroyed 50 of his Automatons
Archon Adept (15) – You reached level 20 as Anjali
Circle of Friends (15) – You achieved at least one level of influence with all three of your companions
Enduring Champion (10) – Over your career, you have sustained at least 100,000 points of damage
Epic Scholarship (15) – You reached level 20 as Reinhart
Fellowship of the Ding (10) – You took part in a level-up while in a four-player game
Fiery Judgment (15) – You have completed the main quest as Anjali
Flawless Victory (25) – You defeated the reborn god without needing to be revived by a companion
Guardian Legend (15) – You reached level 20 as Lucas
Guardian of Ehb (15) – You have completed the main quest as Lucas
Helping Hand (10) – While joined to another player’s game, you used an empowered Defensive Ability to assist the party
I Could Do This Blindfolded (25) – You defeated a major opponent using only your default equipment
Jinx (5) – You were part of a conversation wherein four players were all in agreement as to what to say
Lock, Stock, and Invocation (15) – You have completed the main quest as Katarina
Loremaster (50) – You have discovered 60 lore entries in one adventure
Maximum Bro Fist (20) – Playing co-op as Lucas and Reinhart, you defeated a boss
Maximum Charisma (15) – You achieved the highest possible influence with one of your companions
Merchant of Ehb (5) – You sold over 100,000 coins worth of items
Military Intelligence (5) – You were part of a conversation wherein four players were all in disagreement over what to say
Moment of Solace (20) – Force Jeyne to flee before defeating her handmaids
Nerds Hate Sunlight (15) – You and a friend have played for three hours in one session
Of One Mind (5) – You have agreed on dialogue choices 20 times in one session
Party of Four (25) – You were part of a four-player party that completed the game together
Perfectionist (100) – You completed your quest, plus all other secondary quests in the game
Rajani’s Rival (20) – You bested Rajani without needing to heal yourself
Rivalry (5) – You have disagreed on dialogue choices 20 times in one session
Show Off (25) – You’ve paraded about in nothing but rare items
The Calculus of Victory (15) – You have completed the main quest as Reinhart
Two Girls, One Boss (20) – Playing co-op as Anjali and Katarina, you defeated a boss
Two Perfect Tens (15) – You reached level 20 as Katarina
View From The Top (50) – You have achieved the maximum level
We Are Legion (10) – You have gathered a full party of Legion descendants
Welcome to the Winner’s Circle (100) – You have restored the Legion and saved the land of Ehb
Worthy of Legend (100) – You completed Dungeon Siege III at the highest difficulty level
Here are the ten secret achievements you can unlock:
Aspire to Victory (25) – You stormed the Spire and defeated Jeyne Kassynder
Legion Caretaker (5) – You decided that Gunderic Manor should remain in Legion hands
Lescanzi Ally (5) – You ceded control of Gunderic Manor to Leona
Liberator (5) – You freed all the prisoners in the Spire
Long Live the Queen (25) – You broke the siege of Glitterdelve and saved Queen Roslyn
Royalist Ally (5) – You have shown unwavering support to the Crown
Sacred Meeting (25) – You spoke to the Radiant Youth in the Mournweald
Stonebridge Alliance (25) – You forged an alliance between Stonebridge and the 10th Legion
Through the Murky Mire (25) – You survived a journey through the Eastern Swamp
Trial by Fire (25) – You defeated the archon, Rajani