SEGA got it right

[Arclight]

Their new DRM system:

• Alpha Protocol uses Uniloc: SoftAnchor.

• Uniloc: SoftAnchor requires an internet connection to activate, though you don't need to always be connected to play the game, and the web site offers a work-around if you don't have an internet connection on the PC you install it on. 

• The PC version of Alpha Protocol uses an internet based licensing system, where, after installation, the user is required to enter a product registration code (license key) in order to begin playing the game. 

• You do not have to have the disc in your drive to play the game. 

• The game does not user SteamWorks, and the Steam version of the game will use Uniloc DRM. 

• The game can be installed on up to 5 different computers at any one time using the license key the game comes with. 

• There is a limit to the number of computers you can use Alpha Protocol on at any one time, but Sega says that the company is not restricting the number of computers you can install the game on over the life of the product. 

• SEGA will provide a version of the game without DRM using a future patch that it expects to make available 18-24 months after the game's release.

This Is SEGA's DRM Solution

1-time activation with off-line workaround and though there's a limit on number of installs at the same time, there's no limitation on number of installs overall. Good system imho.