3D Realms is a current video game developer and publisher based in Garland, Texas, formally known as Apogee Software Ltd. The publishing branch is currently known as Apogee Software, LLC. They have been responsible for a number of very successful game series, most notably the Duke Nukem and Max Payne franchises. As well as developing and publishing their own games, 3D Realms also published games for other companies including Activision and id Software amongst others.