Valve Corporation is a well known and high ranking developer of Video Games, headquartered in Reno, California. Most known for the Half-Life franchise, with spin-offs like Red vs. Blu and Portal, as well as the groundbreaking partnership with Westwood Studios to make games of the other's intellectual property (in this case, a Real-Time Military game based off of Half-Life, and a First Person Shooter based on Westwood's Command and Conquer. This partnership also resulted in the Steam platform, an online game retailer and distributor.