Which gaming product launch strategy involved releasing a free playable 'teaser game' that was actually a disguised announcement for a completely different title?

The gaming industry is known for its spectacular product launches that create massive anticipation and drive day-one sales. Companies invest millions in marketing campaigns, events, and partnerships to ensure their new game or console makes the biggest splash possible. Test your knowledge about one of the most successful product launch strategies in gaming history!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

P.T. (Playable Teaser), which was secretly announcing Silent Hills by Hideo Kojima
Fortnite's black hole event, which was announcing Chapter 2
The Stanley Parable: Ultra Deluxe's 'delay game' website that awarded achievements for waiting
Overwatch 2's beta access through Twitch drops to drive streaming viewership