|This article is about a/an mecha in Kamen Rider Zero-One.|
The Auto Drive-Type Humagear Command Weapon Giger (自立駆動型ヒューマギア統率兵器 ギーガー Jiritsu Kudō-gata Hyūmagia Tōsotsu Heiki Gigā) is a type of giant robot jointly developed by ZAIA Enterprise Japan and A.I.M.S., to remotely shut down large groups of Magia in its vicinity. However, the Gigers were stolen by MetsubouJinrai.net, who repurposed them to instead transform large groups of Humagears into Trilobite Magia.
The Giger was undergoing production at the A.I.M.S. headquarters when MetsubouJinrai.net raided it. While Horobi headed to the armory, Jin broke into the hidden factory where the Gigers were being produced and used a Zetsumeriser to reprogram a single completed unit. The hacked Giger unit proceeded to partially destroy a nearby hospital and covert several of its Humagear staff into Trilobite Magia. To combat this threat, Yua Yaiba gave the Mammoth Zetsumerisekey to Izu, who used it to create the Breaking Mammoth Progrisekey. Zero-One used the new Progrisekey to transform access Zero-One Breaking Mammoth, an older mech design created during the tenure of Korenosuke Hiden that was very similar to the Giger. With his new form, Zero-One was able to destroy the Giger.
After Horobi's temporary deactivation by Vulcan, Jin was able to somehow able to take control of several more Giger units along with an army of Trilobite Magia produced by the Ark. When Zero-One arrived and transformed into Shining Assault Hopper, the Gigers combined their attacks with Jin and were able to overwhelm Zero-One. However, Zero-One then activated Shining Assault Hopper's Shine System, which enabled him to destroy the Gigers.
The Giger's design, as noted by Izu, bear a similarity to Breaking Mammoth in its armor form. Unlike Breaking Mammoth's humanoid face, the Giger's head is simplistic and features a single central eye. It doesn't display the ability to transform, and is not equipped with the Mammoth Pressers on its arms. However, it features tusk-like blades identical to Breaking Mammoth's Graingots that it can detach from its torso to wield as handheld weapons. After being reprogrammed by MetsubouJinrai.net, the Giger can produce numerous tendrils similar to those used by the Magia from its hands, which it uses to transform Humagears into Trilobite Magia.
- The Mammoth Zetsumerisekey is implied to be the means by which MetsubouJinrai.net used to control the Giger unit they had hacked, as the Breaking Mammoth Progrisekey based on it has the ability to control Breaking Mammoth, the Giger's predecessor. This is further supported when a second Mammoth Zetsumerisekey is expelled from the stolen Giger unit after it is destroyed by Zero-One. Upon closer inspection the key that fly out of the stolen Giger unit is the Mammoth Pressers.
- Kamen Rider Zero-One