Has it been ten years already? Time sure does fly by fast doesn't it? Rockstar and Microsoft are commemorating the tenth anniversary of Grand Theft Auto III by slashing the prices of GTA items for PC, including the GWFL enabled http://www.trueachievements.com/Grand-Theft-Auto-IV--PC....htm.

Here's the two items that carry achievements:

http://www.trueachievements.com/game.aspx?gameid=1857 - $19.99 / £19.99 $5.99 / £5.99
http://www.trueachievements.com/Grand-Theft-Auto-IV--PC....htm "Episodes from Liberty City" - $19.99 / £19.99 $11.99 / £7.99
(contains both The Ballad of Gay Tony and The Lost and Damned DLC's)

If you're interested in other GTA content, check the link below for more savings. These deals are good through October 27th. Check your local region's marketplace for pricing.