Why is prepurchase unavailable?

[Tor]

Tried to buy the package and cant get the game for some reason.

Is it cause it is close to release or?

[ThomJWD]

No, it is currently a Steam downtime period :) Just watch out the sticky threads on all forums ... Steam is down completely :)

Here: http://forums.steampowered.com/forums/announcement.php?f=809