Sonic Frontiers' Second Free Content Update Celebrates Sonic's Birthday, Arrives Today - Game Informer

The update is called Sonic's Birthday Bash and will add several features including New Game Plus.

Sonic Frontiers Celebrates Sonic's Birthday With a Free Update

Everything Included in the Sonic Frontiers Birthday Bash Update - Prima Games

Everything Included in the Sonic Frontiers Birthday Bash Update - Prima Games

Sonic Frontiers Official Website

Sonic Frontiers director promises “serious” and “dramatic” storytelling - Dexerto

Sonic News, Page 2

Sonic Frontiers Official Website

Sonic Frontiers 'Sonic's Birthday Bash' update launches today - Gematsu

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Sonic Central 2023, shoe, partnership

Sonic Frontiers – Sonic City Sonic the Hedgehog News, Media, & Community

Sonic Frontiers' Second Free Content Update Celebrates Sonic's Birthday, Arrives Today - Game Informer

Sonic Frontiers' Free Update Sonic's Birthday Bash is Out Now - QooApp News