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