This total conversion mod for Half-Life 2 focuses on class-based teamplay in a modern setting. Choose from a number of different classes and gain experience points based on your completed objectives and kills. The maps are dynamic with multiple objectives. v3 includes four new maps and a new strategy system/creator.

http://www.gamespot.com/pc/action/halflife2/downloads.html?part=rss&tag=gs_all_games&subj=6128745