HoYo FEST 2021 was an annual celebration held by the global live service game publisher HoYoverse. The celebration is comprised of themed collaborations with six café establishments from Southeast Asian countries from November 5 to December 14, 2021. In the Philippines, the HoYo Fest celebration was held in the Moon Rabbit Café & Restaurant in the City of San Juan, Metro Manila. It is the first HoYo Fest event held in the series.

HoYo FEST 2021 was followed by HoYo FEST 2022.

HoYo FEST 2021 was a simultaneous themed collaboration event in six cafés in the Philippines, Indonesia, Malaysia, Thailand, Singapore, and Vietnam. The following games participated in the event, along with the dates of when the games were themed in the cafés:

• Honkai Impact 3 - November 5 to 16
• Tears of Themis - November 19 to 30
• Genshin Impact - December 3 to 14