You receive login credentials for a shared Steam account.
Good news: The full single-player campaign, all collectibles, workbenches, and the Axis Invasion AI (offline version) are 100% functional. Sniper Elite 5 Offline Activation
Whether you're looking to bypass persistent online requirements or are using a third-party activation service, What is Offline Activation? You receive login credentials for a shared Steam account
Epic’s offline support is less reliable: Sniper Elite 5 Offline Activation