Here's a pretty sweet deal for video game fans. If you haven't picked it up already, Portal 2 is available for download on Steam for $4.99 US. Normally a $19.99 US purchase, Steam has put it on sale until tomorrow at 1pm EST which means you only have 24-ish hours to take advantage of the deal.
Despite being released in mid-2011, Portal 2 is still a great game to play; especially if you have a friend who wants to run through the co-op mode with you. As with most Steam games, Portal 2 has achievements, stats and full controller support. Metacritic gave it a 95/100 which means you should probably stop reading this description and download immediately.
The discounted price will expire tomorrow roughly around 1pm EST.