If you own a GeForce graphics card and still haven’t played Portal, then you might want to grab this Nvidia-exclusive download of Valve Software’s 2007 hit first person shooter. Portal: First Slice is freely available via Steam
, which will automatically scan your PC to check if you’ve got an Nvidia card under the hood.
Unfortunately it is not the full game but rather an “extended demo” – as the website calls it – and offers no new content to those who have already played the full version of Portal. The demo comes as part of a recent agreement between Valve and Nvidia to “collaborate on development, distribution, events, and more.” Additionally, Nvidia users can also download Peggle Extreme, Half-Life 2 Deathmatch, and the Half-Life 2 tech demonstration level “The Lost Coast” free of charge from that same site.