In many video games, especially computer role playing games, treasure chests contain various items, currency, and sometimes monsters. For certain role playing games, some chests are actually mimics, which is a monster that looks like a chest, but will attack the player when they attempt to open it. This is notably seen in the Seiken Densetsu and Dragon Quest series.
Treasure chests provide a means for the player to obtain items without paying for them in stores. In some cases, these chests contain items that can't be purchased at stores. Chests may be locked, requiring a key of some sort. For certain games, keys can only be used once, and the key is destroyed during its use. For other games, having a particular type of key means that the player can open any of the chests with a matching lock.
For most games, once a chest has been opened, the contents remain empty, although they may be repopulated with possibly different items during different stages of the game. This is different from perishable containers, such as crates and jars, which tend to reappear if the player exits the area and then returns.