The Bonus Act is one of the five Acts that is currently the most valuable to complete all five bounties. Beginning in [[Patch 2.3], when players finish the fifth bounty in the Bonus Act, Tyrael awards a [[Bonus Cache]] on top of the normal Horadric Cache. The bonus cache contains only gold and materials, but it always matches the amount of [[Horadric Cache materials]] that drop from the full Cache, doubling a player's take of these scarce and valuable materials.

A '''Bonus Horadric Cache''' is earned from Tyrael, along with the normal [[Horadric Cache]], when a player completes all five bounties in the randomly-selected "Bonus Act." This feature was added in [[Patch 2.3]]. Since the bonus act switches to a different act once it is completed, a player can do all five acts for bonus in the same game, earning 5 Horadric Caches and 5 Bonus Caches in sequence.

Players can also treat their clan or friends to free caches by completing all or most of an act, then inviting people to join the game before they finish up and claim the cache rewards.