Transmissions: Element 120 introduces new gameplay and storytelling elements. The Projector is powered by Unbinilium, hence the title of the mod. Taking place at an unspecified time and location after the events of Half-Life 2: Episode Two, the modification features a device and weapon called the Zero Point Energy Projector, which allows the player to perform jumps of great heights by launching energy orbs while mid-air the projectiles can also be used to land safely, take out enemies, and destroy barricades, windows, and fences, among others.