http://store.steampowered.com/app/400/
one of the best games ever made and its free got to love valve
also a lot of mods will run off of this and many of these are games unto themselves the one in my sig is a good example
EDIT: portal now runs on macs too but mods have never been tested on a mac
one of the best games ever made and its free got to love valve
also a lot of mods will run off of this and many of these are games unto themselves the one in my sig is a good example
EDIT: portal now runs on macs too but mods have never been tested on a mac
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