I noticed Tomb Raider Legend on my shelf yesterday. I vaguely remember enjoying it over a decade ago. When I opened the CD case I found no license key. Before I hunt out my optical drive, is this correct? Or is there copy protection so I need to play the game with the drive attached? It's only a fiver or so on Steam (and I just missed getting it for free) so it's no big deal, but a fiver's still a fiver.