Technically, yes. Legally, no one cares.
Unlike modern DRM (Denuvo, Steam authentication), the IGI 2 copy protection was a product of its time—SafeDisc. To play, you needed:
– Unfortunately, no official key recovery service exists for IGI 2 today. Your best option is repurchasing on GOG (often $5–10 on sale).
While this was originally a rudimentary form of copyright protection (DRM), the CD Key served a secondary, vital purpose:
, the code is sent to your email or stored in your store account dashboard. Multiplayer Key Activation