Here is the full list of all 30 The Settlers: New Allies achievements worth 1,000 gamerscore.
Complete all achievements
Complete all tutorial missions
Complete the first campaign mission
Complete the campaign's first act
Complete the campaign's second act
Complete the campaign
Recruit 2.000 Ritualists
Recruit 2.000 Elementalists
Recruit 2.000 Alchemists
Produce 250.000 boards of lumber
Produce 15.000 breads
Produce 100.000 weapons
Win 100 multiplayer matches as Elari
Win 100 multiplayer matches as Jorn
Win 100 multiplayer matches as Maru
Unlock all advanced academy trees in one multiplayer match
Sell 100.000 goods in multiplayer
Purchase 2.000 goods in one multiplayer match
Complete 500 landmarks in multiplayer
Build 1.000 residences in multiplayer
Produce 50.000 gems
Recruit 150 engineers in one multiplayer match
Build 50.000 road segments in multiplayer
Recruit 150 Donkey Carts in one multiplayer match
Recruit 200 Elari Arbalists in one multiplayer match
Recruit 200 Jorn Berserkers in one multiplayer match
Recruit 200 Maru Javelins in one multiplayer match
Win 10 onslaught missions
Earn 500 endorsements
Earn a total score of 1.000.000 in multiplayer