From Valve Corporation, this is "Half-Life 2" for PC; rated Mature: 17+ (Blood; Intense Violence; Language).  See photos of box for information on system requirements.

Package weighs 4.6 ounces and measures 7.5" x 5.5" x1".  Stored in a smoke-free, climate-controlled home. 

Shipment by US Postal Service Priority mail.