The Hitman 3 Legacy Pack is essentially just a DLC that allows players to visit remastered locations from older Hitman titles in the new ones.
IO Interactive (IOI) is no stranger to progression among its now three series games—thus, their introduction of the Legacy Pack. Originally, introduced in 2018, the Legacy Pack was released as an easy way for players to access their favorite spots from Hitman in Hitman 2, all contained within the World of Assassination. The type of Legacy Pack and its corresponding cost varied according to a player's choice of version.
Here's how it will work with Hitman 3.
Hitman 3 Legacy Pack
The Legacy Pack exists to add to the transfer of progression from Hitman 2 into Hitman 3 within the same console family. Progress made in Hitman 2 through the Legacy Pack will be automatically included with the usual translation to Hitman 3.
IOI has determined to only check for the installation of Hitman 2 going forward into Hitman 3. This means that players looking to keep their information will need to follow the process meant for transferring via the Legacy Pack. Fortunately, IOI has outlined this process on their website within a detailed FAQ.
Essentially, depending on the console, once players launch Hitman the game will automatically grant them access to the correct Legacy Pass as long as it detects content from the previous title.
More information on the Legacy Pack and other specific additions before launch is available on IOI's website.