Phishing for your Steam, Epic, or console login credentials.
It sounds like you're looking for information on how to get for free. While the game usually requires a purchase, there are a few legitimate ways it has been made available at no cost in the past. Legitimate Ways to Get Alan Wake Remastered for "Free" Alan Wake Remastered Free Download
Downloading copyrighted material from unofficial sources can lead to ISP warnings or account bans. Phishing for your Steam, Epic, or console login credentials
The game was previously a monthly "Essential" tier game. If you claimed it then, it remains in your library as long as you have an active subscription. Phishing for your Steam
While the Remaster isn't always on the service, the original version often is, and the Remaster occasionally rotates into the catalog.