3D Realms (thanks Frans) offers an update for customers who purchased Prey through Triton, announcing 2K will be mailing a boxed copy of Human Head's shooter to those who bought the game online through Triton, since such copies are currently non-functional (story). Here's word:

As those of you who purchased Prey through Triton are by now aware, the service is no longer functioning. This is an unfortunate happening, but we do have some good news for all of those who bought Prey through the Triton service.

2K has set up a replacement program for customers who purchased Prey via the Triton download service. A new boxed copy of Prey will be shipped to each customer who purchased the game via Triton, DiStream or www.playtriton.com, as Triton is undergoing a reorganization process and copies downloaded from the service may not function properly. There is no action required on the part of the purchaser. Boxed copies will be mailed automatically to the credit card address on file. Thank you for your patience during this interim period; we look forward to getting affected customers back up and playing Prey as soon as possible.