The minigame takes place on a stone tower surrounded by water and other stationary towers. The four players are positioned at their sides equally, as a Hammer Bro riding in a cloud appears in the center of the playfield. The minigame then begins.
The players have the opportunity to collect as many Coins as possible within the time limit of 30 seconds. The Hammer Bro moves around the center of the tower, dropping various objects on the floor. Collectible objects include single Coins and Coin Bags that are worth five Coins. Dropped objects bounce towards the edge of the tower before disappearing forever, so the players must gather those Coins and Coin Bags as quickly as they can within the limited space. The Hammer Bro can also throw out hammers to harm players. If a player gets hit by a hammer, they will be stunned momentarily, causing the player to temporarily lose the ability to pick up the collectible objects. Falling off the tower will not let the player continue participating in the minigame, but they will keep the Coins they gathered before falling.
There is no winner or loser if the minigame ends when the time limit is up. All the players keep the number of Coins they collected in the minigame regardless if they fell off the top of the tower or not. However, if every player falls off the tower before the minigame ends, then the game ends with a "Miss!"
The minigame can be purchased from the Mini-Game House for 450 Coins when it is available for purchase.
Hammer Drop reappears in Mario Party Superstars. In it, if a player falls off the tower, they will lose all of the money that they had collected.
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