Linux Game Publishing Copy Protection
Supposedly a key/name/password system designed for full legal copying & installation rights for legitimate buyers while discouraging illegal copies.
Alternate name: LGP Copy Protection
The first video game about Linux Game Publishing Copy Protection was released on December 21, 2001.
Linux Game Publishing has published all these games
LGP claims one can install and run the game without an internet connection, copy the game for personal use, install the game on multiple computers for personal use, freely transfer/buy/sell the right to use the game (tools to assure buyers of getting a legitimate copy are provided at the website), key/name/password are required only when installing or making significant changes to your hardware, and all this can be done without the original CD (which is touted as an advantage to the customer).