CDK，全称为 CD-Key，是游戏世界中的“专属代金券或“礼品卡 ... 空洞骑士在市面上压根没有发行过CDK ...

Turns out there are greater hurdles to face than having to stare down a charging Yao Ming -- like manifesting a CD key out of thin air. That's just the challenge faced by those who purchased NBA 2K9 ...

Valve Pays Hacker $20K for Bug That Generated CD Keys Security researcher Artem Moskowsky discovered he could generate activation keys for any game available on Steam without paying for them.