The Geno Breaker (ジェノブレイカー, Jeno Bureikā) (EZ-034) is a Tyrannosaurus-type Zoid, and one of over 200 species of biomechanical lifeforms depicted by TOMY's Zoids franchise. Based on the Geno Saurer, the Geno Breaker was first released in 2000, and the Zoid plays a significant role in both the Battle Story and the Zoids: Guardian Force anime.

The Geno Breaker is a main rival to the Blade Liger.

Designed for speed and mobility, instead of back-mounted cannons like in the Geno Saurer the Geno Breaker has a large thruster pack, allowing the Zoid limited flight capability. The pack also is equipped with a large pair of multi-purpose claws mounted on extendable mechanical arms known as X-Breakers.

Besides serving as close combat weapons, the X-Breakers are heavily armoured, allowing them to be used as shields. There are no cannons like on Geno Saurer's nose, but instead the Geno Breaker features a retractable Laser Charging Blade.

Its Charged Particle Cannon can now be fired from the air, with the Breaker countering the recoil of the blast with its boosters, as well as in any direction the pilot wishes, be it on the ground or in the air.

For all its strengths, the Geno Breaker's specialised design leaves it lacking rear protection[citation needed], as all of its weapons are fixed facing forwards.

In the anime, the Geno Breaker (as well as the earlier Geno Saurer) is depicted with an additional weapon. It is able to launch its hands on long, retractable cables like grappling hooks to grab and restrain Zoids at a distance, and pull them into its line of fire. However, unlike the Geno Saurer, the Geno Breaker was never depicted as being able to deliver an electrical shock through the claws. The anime also depicts the Geno Breaker with an Energy Shield, which it deploys by linking together the tips of its X-Breakers.