Steam news announces a free weekend is underway in F1 2013, coinciding with a 75% off sale on the Formula One racing game. The game can be played for free between now and Sunday at 4:00 pm EDT. Here's word:

Make history in FORMULA ONE™! F1™ 2013 features all the cars, stars and circuits from the 2013 FIA FORMULA ONE WORLD CHAMPIONSHIP™ plus, for the first time, classic content. F1 Classics is an expansive new game mode, introduced by legendary broadcaster Murray Walker, in which you’ll race legendary drivers in famous cars on iconic circuits from the 1980s. This classic content can be played in a range of modes including split-screen and online multiplayer.