Here is the full list of all 20 Order & Chaos Online (Windows) achievements worth 200 gamerscore.
Reach level 15
Join a party 5 times
Loot an Epic-level Item
Reach level 10
Kill 40 monsters
Sell 5 items
Loot a Good-level Item
Obtain a gold coin
Open a Lucky Chest
Assign your talent
Use the teleport one time
Loot 20 times
Loot a Superior-level Item
Complete 5 quests
Finish a Tutorial Mission
Reach level 20
Reach level 30
Reach level 40
Reach level 50
Reach level 60