A specific older game
Underground 2 is a particular entry in the Need for Speed series. A newer game with a similar name is not a substitute edition of the same release. When searching a store, compare the complete title and publisher rather than following an image or a shortened headline.
Start with a legitimate copy
If you already own the PC edition, retain the original installation media and purchase details. Check the publisher’s support resources before applying community changes. Make a copy of your save files and record any patches so you can return to a known setup.
Availability is a separate question
An archived full-version headline is not evidence of a current authorized download. This page does not supply an ISO or claim that the game is available in every regional store. The official Need for Speed site is a starting point for the franchise and its support routes.