served as the "play" disc required for copy protection verification
You eject the current disc (Disc 3). You reach for Disc 2. It is in the back of the multi-disc wallet, behind a stack of Age of Mythology and Rollercoaster Tycoon discs. You slide Disc 2 in. The drive whirs. Click. Whir. Click. The PC freezes for 45 seconds. Then, a blue screen, or worse—the game minimizes to desktop, and when you click back, it is a black void. Please Insert Disc 2 Nfs Underground 2