From Rampage Knights Wiki
Rampage Knights. It can be opened using lockpicking to obtain the items inside, which can include gold, treasure, food and potions.
|Open 20 chests||None|
|Lockpick 200 chests||Lockpicking always has only one phase|
|Lockpick 50 chests without fail||+20% gold from chests|
|Chest • Demonic Chest • Fancy Wooden Chest • Freakin' Huge Golden Chest|