Graphsim Entertainment is a software publisher that focuses primarily on air combat simulators and similar simulation games. It was founded in 1992 as Graphics Simulations to publish Parsoft Interactive's seminal Hellcats Over the Pacific for the Mac. When Parsoft went on to write A-10 Attack!, Graphsim used an un-finished F/A-18 precursor to develop F/A-18 Hornet. Hornet spawned a number of upgrades, mission packs, and a port to Microsoft Windows in 1995. Today, Graphsim is primarily a distributor, with their notable products being X-Plane; Falcon 4.0: Allied Force; and the latest version of the F/A-18 franchise, F/A-18 Operation Iraqi Freedom.