There is an adorable NPC in Stardew Valley called the Hat Mouse. He lives in the Abandoned House to the south of Cindersap Forest and, as his name suggests, he sells hats. However, his stock grows over the course of the game and each hat has a specific unlock trigger. 

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The Hat Mouse will send you a letter the morning after you complete your first achievement in game, so it makes sense that each of the hats he goes on to sell only unlocks after you’ve earned its accompanying achievement. 

There are some exceptions to this, such as the hats that are won by coming first in seasonal events. 

How to unlock every hat with the Hat Mouse in Stardew Valley

Whenever you get a new achievement in Stardew Valley, make sure to visit the Hat Mouse to see what new and fun accessories he has on offer. Every hat sells for the same price of 1,000 Gold. 

HatAchievementHow to getGood Ol’ CapGreenhornEarn 15,000 GoldLucky BowCowpokeEarn 50,000 GoldCool CapHomesteaderEarn 250,000 GoldBowler HatMillionaireEarn 1,000,000 GoldSombreroLegendEarn 10,000,000 GoldBlue BonnetTreasure TroveDonate 40 items to the MuseumCowboy HatA Complete CollectionComplete the Museum collectionButterfly BowA New FriendReach 5-heart friendship with someoneTiaraCliquesReach 5-heart friendship with 4 peopleSanta HatNetworkingReach 5-heart friendship with 10 peopleEarmuffsPopularReach 5-heart friendship with 20 peopleMouse EarsBest FriendsReach 10-heart friendship with someoneCat EarsThe Beloved FarmerReach 10-heart friendship with 8 peopleDelicate BowCookCook 10 different recipesPlum ChapeauSous ChefCook 25 different recipesArcher’s CapGourmet ChefCook every recipeTropiclipMoving UpUpgrade your houseHunter’s CapLiving LargeUpgrade your house to maximum sizeDaisyD.I.Y.Craft 15 different itemsTrucker HatArtisanCraft 30 different itemsGnome’s CapCraft MasterCraft every itemSou’westerFishermanCatch 10 different fishOfficial CapOl’ MarinerCatch 24 different fishEye PatchMaster AnglerCatch every fishWatermelon BandMother CatchCatch 100 fishPolka BowGoferComplete 10 ‘Help Wanted’ requestsChicken MaskA Big HelpComplete 40 ‘Help Wanted’ requestsCowpoke HatPolycultureShip 15 of each cropCowgal HatMonocultureShip 300 of one cropGoblin MaskFull ShipmentShip every itemChef HatGourmet ChefCook every recipe

There are also three other hats which become available at the Hat Mouse once the criteria is met:

  • Straw Hat
    • Win the Egg Hunt at the Egg Festival
  • Sailor’s Cap
    • Win the Fishing Competition at the Festival of Ice
  • Elegant Turban
    • Earn all other achievements

How to put hats on Cats and Dogs in Stardew Valley

Screenshot by Destructoid

All of the Hat Mouse’s hats, as well as any other that can be found in Stardew Valley can be placed on Cats and Dogs. 

To do this, place the hat into your inventory and select it, before right clicking on your pet. I’d advise that you don’t do this near water, because you might lose any hat that they were already wearing. 

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