Here is the full list of all 49 Dark Messiah of Might and Magic: Elements achievements worth 1,000 gamerscore.
Push 5 enemies into the void without be spotted by the victim
[Ranked] Win a ranked match 20 times
Win 20 matches hosted by yourself. Requires at least 8 players.
Win 10 team deathmatches. Requires at least 8 players.
[Ranked] Kill more than 666 enemies in total for ranked matches
[Ranked] Not getting killed a single time in a ranked match, and killing at least 7 victims
[Ranked] Score more than 1500 as an Archer in a ranked match
[Ranked] Score more than 1500 points as a Mage in a ranked match
[Ranked] Score more than 1500 points as a Priestess in a ranked match
Capture 3 enemy flags in the same match. Requires at least 8 players.
[Ranked] Complete a map in Blitz mode in a ranked match in less than 8 minutes.
Recover all relics
Weapon collection complete (Swords, Daggers, Staffs & Bows)
Equipment collection complete (Armors, Shields, Rings)
Discover at least 42 secret places
Kill 50 enemies only with bow
Complete the game
Complete the game in difficult mode
Kill 4 cyclops during your adventure
Save Ishtvan in the Necropolis
Recover 60% of relics
Reach the Necropolis
Kill PaoKaï near the Necropolis
Save Leanna in the giant spider's den
Kill 20 enemies with Backstab strikes
Defeat all enemies in Rubby's Arena
Kill 10 enemies in the form of a demoniac
Forge 3 different swords during your adventure
Recover the Skull of Shadows in the temple of the Spider Goddess
Find the gems in the temple of the Spider Goddess
[Ranked] Score more than 3000 points in a ranked deathmatch
[Ranked] Score more than 1500 points as a Warrior in a ranked match
[Ranked] Kill 15 enemies before being killed in a ranked match
[Ranked] Kill the player who has just killed you in a ranked match
Kill 50 enemies with magic
Make 5 enemies fall on a frozen ground with the 'Freeze' spell
Win 10 Crusades on the Human side. Requires at least 8 players.
Win 10 Crusades on the Undead side. Requires at least 8 players.
Win a Crusade. Requires at least 8 players.
Recover 30% of relics
Kill 50 enemies amongst spiders, undeads or ghouls
Defeat Aratrok loyally without magic
Kill 2 enemies at once while under the effects of adrenaline
Kill PaoKaï at the temple of the Spider Goddess
Kill 50 enemies using these methods: fire, pick, void and physical object
Take over the boat in the hands of necromancers
Kill 10 enemies under the effects of adrenaline
Kill 60 enemies only with sword
Complete the tutorial