For those who have yet to experience the nausea-inducing puzzles of Portal, Valve has now released the 2007 title onto the Linux Steam Store
. While many users of Steam have probably already played the title multiple times thanks to a free offering when it became available for Mac, and its successor Portal 2 as well, the title is now running for $6.99 for those who have to help Chell escape.
For those on Linux eagerly awaiting for the availablility of Portal 2, PCgamesN
has spotted the title in the 'all games tab' but notes that it is currently greyed out, presumbably waiting for the official flick of the switch.