Full list of all 45 Sacred 3 achievements worth 1,180 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game on Xbox 360.
The base game contains 37 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 8 achievements worth 180 Gamerscore.
Kill 8 Grimmoc-sized enemies with one attack
Execute 5 enemies in a row
Reach level 50 with any character
Max out any culture's Combat Arts, Skills, and Equipment trees
Complete a main mission with three other players
Defeat the final form of Zane within 30 seconds
Complete all main missions on Deity difficulty
Unlock all item upgrades
Kill a Troll without getting hit by it in single player mode
Defeat something big with only one hit using a smart bomb
Reach level 30 with any character
Complete all main missions in local co-op mode
Complete all main missions on Legend difficulty
Defeat Zane
Complete all Rank 2 missions
Complete Greyveil with the Ancarian
Stop the Unspeakable Evil
Interrupt five enemies while they are targeting other players
Use your Combat Arts 80 times in N'Aquali during a single playthrough
Reach level 10 with any character
Use your Battle Prayer 10 times
Complete Khorad Basin with the Well purity at 70% or greater
Die from an explosive destructible
Achieve the highest multiplier in a damage run
Complete one main mission in local co-op mode
Complete the Rank 1 mission
Get a level up
Max out all cultures' Combat Arts, Skills, and Equipment trees
Complete all main missions with three other players
Complete a main mission as the top scorer in a game with three other players
Break the shields of all ghostly orbs and destroy them in a single phase
Revive every other player in a single mission with three other players
Complete a mission with four characters from different cultures in co-op mode
Complete Icecreek Sanctuary with the Seraphim
Complete Vorios with the Safiri
Complete Enigmar Fortress with the Khukuri
Complete a mission with four female characters in online co-op mode
Complete Braverock with the Malakhim
Reach level 50 with the Malakhim
Defeat the Black Seraphim
Complete all side missions of Underworld Story
Complete Khorad Basin with the Orc
Reach level 50 with the Orc
Kill Gragon
Complete all side missions of Orcland Story