Halo 3 introduces a new feature in regards to Multiplayer; the ability to customize one's armor. Much like in Halo: Combat Evolved and Halo 2, a player can customize their character's armor color. However, in Halo 3 a player can now customize their character's helmet, shoulder armor, and chest piece. This feature makes characters like Caboose, C.T., the Meta and others possible. Additionally, Halo 3 introduced a new weapon setup that allows a character's secondary weapon to be visible when not held, typically mounted on their back or thigh.
Halo 3 also introduced two new features that would completely change the future of Machinima; the Forge and Theater modes. Using Forge mode, Players could now use a built in tool kit to effectively build scenes from a selection of props and stage materials. The Theater mode meanwhile made for an improved method of shooting. Players could now record footage and replay it at will, allowing a single scene to be shot from multiple angles, as opposed to filming live.