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