Here is the full list of all 44 Gocco of War achievements.
Buy a Gatling Weapon
Clear NO.018 Hard
Clear NO.014 Hard
Clear NO.007 Hard
Clear NO.003 Hard
Clear NO.010 Hard
A Weapon MAX Level
Gold 100000G
Material Item Dictionary 75%
Clear a Quest in 4 players
Clear NO.020 Quest
Get a Rank S badge
Beat 1000 monsters
Clear NO.015 Quest
Material Item Dictionary 50%
Clear NO.010 Quest
Beat 500 monsters
Gold 10000G
Material Item Dictionary 25%
Clear NO.005 Quest
Get a Rank A badge
Join in over 20 people lobby
Beat 100 monsters
Get a Rank B badge
Chain Bonus * 1
Chain Bonus * 3
Get a Rank C badge
Clear NO.000 Quest
Male Clothing Dictionary 25%
Male Clothing Dictionary 50%
Male Clothing Dictionary 75%
Male Clothing Dictionary 100%
Female Clothing Dictionary 25%
Female Clothing Dictionary 50%
Female Clothing Dictionary 75%
Female Clothing Dictionary 100%
Material Item Dictionary 100%
Chain Bonus * 10
Buy a Hummer Weapon
Rank S badge * 50 available in total
Rank S badge * 100 available in total
Clear all Quests all difficulties
Beat 100000 enemies in party
Partner with 1000 online people in total