While Left 4 Dead was the game of choice for demoing 3D technology at CES this year, one enterprising reader sent in a tip: you don't need any expensive glasses or new technology to play the game in 3D... although getting the effect may take some doing.

You'll need to be running either Vista or XP, you'll need an Nvidia 8XXX series or higher, you'll need a pair of those nifty 3D glasses from the Super Bowl promotions, and lastly you'll need a copy of Left 4 Dead. The rest you can find online.

The site gives you a list of what you'll need to do, as well as what drivers you'll need, to get the desired effect.

You will need to install some Nvidia drivers first.

What will this do? Enable you to play the game in 3D, changing the colors to those suited to the Super Bowl glasses. This gives you a nifty—not to mention mostly free—3D effect. While going through all this madness is rather time-consuming... hey, it's 3D!

Sadly, I play Left 4 Dead on my Macbook Pro (yes, yes, I know) so I can't test this out, but the effect is apparently very convincing. If anyone gives this a try, send in your experiences—we'd love to hear what you think.

Thanks to Dragon[THC] for the heads up.