Registration Key

[SpaceYeti]

I bought the game via steam on my windows machine, and now I have recently switched to using linux (ubuntu). In order to install the full client on linux, I need a registration key, but I cannot seem to find this key in the email receipt from steam, nor anywhere in my steam account. I tried a search for the steam_altitude_key in regedit on my windows partition, but it come up with nothing.

Is there anyway I can find my registration key from m steam account to install on linux, or do I need to buy another copy of the game?

Thanks!

[Pieface]

You'd have to purchase a registration key separately if you want to run the full client:
http://altitudegame.com/forums/showthread.php?t=3039