An experimental quadrupedal drone, the gargantuan unnamed Prototype Walker was intended to punch through the heavily entrenched forces of both GDI and GloboTech. To facilitate this it was armed with a powerful frontal LASER similar to the Obelisk of Light. In addition, the Walker's armour was a further development of the composite plating created during the Eclipse program. However the inner facing was coated with an EMP resistant lining, allowing it to effectively nullify one of GDI's major advantages.
Despite it having the technological edge it appears that both prototypes were destroyed by the tenacious GDI Commander.