Limbo is a wonderful game, and now that it's available on both the PlayStation Network and Steam, an entirely new audience for the game has been opened up. Just in case you still need convincing, or simply don't like paying for your games, we're going to be giving away 20 copies of the game on the PC, via Steam. If you were hoping for something new to play this weekend, we have you covered.

So how do you do win? It's simple: e-mail giveaways@arstechnica.com with the subject line "Scarier than Shelob" That's it. We'll take entries from now until 5:00pm CDT today, and then run a random number generator to pick the 20 winners. We'll e-mail the code directly to you if you've won. I'll also be giving away ten copies of the game on my personal Twitter account, and you can try to grab those by following twitter.com/BenKuchera.

In brief, you must 18 years old or older and a resident of the United States or Canada (sans Québec) to be eligible. The giveaway begins at 10:00am CDT August 5, 2011 and ends 5:00pm CDT August 5, 2011. We'll choose the winner on or around August 5, 2011. Please take a moment to read the full rules.

Limbo is available now on the PC, PS3, and Xbox 360.