Homeworld: Remastered Collection was released on February 25, 2015. The collection includes the original and remastered versions of Homeworld and Homeworld 2. The "Classic" versions of Homeworld and Homeworld 2 are recompilations of their original source code with some compatibility fixes, while the "Remastered" versions use an updated version of the Homeworld 2 engine. The remastered versions have high resolution textures and models, new graphical effects, and support for HD, Ultra HD, and 4K resolutions. Multiplayer for both "Remastered" games has been combined and uses the Steam network.