To successfully unlock Brewster’s café, The Roost, in Animal Crossing: New Horizons, follow this detailed guide to ensure you meet all prerequisites and complete necessary tasks.

Prerequisites
Before you can open The Roost, make sure that you satisfy the following requirements:

– Game Update: Ensure your game is updated to the 2.0 version. This update is essential for accessing Brewster and the café features.
– Resident Representative: You must be the Resident Representative of your island, as only the representative can initiate island-wide projects.
– Island Rating: Achieve a 3-star island rating by developing your island, placing decorations, and ensuring a healthy balance of flora and fauna.
– Museum Upgrades: The art wing of the museum needs to be unlocked. This requires you to donate at least one piece of art, in addition to one fish, one bug, and one fossil.

Unlocking The Roost
Here’s a step-by-step guide to unlocking The Roost:

1. Visit the Museum: Start by going to the museum and speaking with Blathers. He will express his wish to expand the museum by opening a café. He will also mention needing Brewster’s help for this.

2. Find Brewster:
– Blathers will assign you a task to locate Brewster. To do this, you’ll need to visit Kapp’n’s Mystery Islands.
– Kapp’n’s Mystery Islands become accessible one day after K.K. Slider makes his first visit to your island.

3. Encounter with Brewster:
– Once at Kapp’n’s Mystery Island, search for Brewster. When you find him, interact with him; he will talk about his interests in gyroids and offer you a gyroid fragment.
– After your conversation, Brewster will confirm he is interested in coming back to your island, agreeing to return the next day to open The Roost.

4. Returning to the Island:
– After Brewster departs, head back to your island. The following day, check the museum; Brewster will start setting up The Roost within the building.
– Once everything is in place, The Roost will officially open, allowing you to enjoy the various offerings it has, from coffee to special interactions with Brewster himself.

Once you’ve completed all these steps, you can now visit The Roost any time to enjoy its cozy atmosphere, sip some coffee, and engage with your island community in this beloved venue. Enjoy your time at Brewster’s café!