Drillhorn (G1)
| This article is about the Generation 1 Decepticon. For the Animated Decepticon, see Drillhorn (Animated). |
- Drillhorn is a Decepticon Breastforce Warrior from the Victory portion of the Generation 1 continuity family.

Drillhorn (ドリルホーン Doriruhōn) is the veteran strategist amongst the Breastforce group. He is very knowledgeable and very tough... and can be quite opinionated, to the point of being stupidly bull-headed. His adherence to past battle experiences can often leave him unprepared for unexpected changes in the battlefield.
Drillhorn is accompanied by his Breast Animal partner, Hornbreast, a robotic rhino that can transform into either his chestplate or a hand-held blaster. Like his fellow Breastforce warriors, he is also armed with an Electromagnetic Nunchaku.
Drillhorn can also combine with his Breastforce teammates to form Liokaiser, becoming the left leg of the super robot.
Fiction
Japanese Generation 1 cartoon continuity
Victory cartoon
- Voice actor: Yukimasa Kishino (Japanese, ep. 4), Masato Hirano (Japanese), Yūki Satō (Japanese)
Drillhorn came to Earth alongside Jallguar and Killbison to join their commanding officer Leozack in service of Deathsaurus. For his first mission on Earth, Drillhorn aided in an attempt to take over an energy plant in the desert,Unite!! Multiforce and later helped raid the Neo Uranium Mines. Infiltration... The Uranium Mine When the Breastforce embarked on a scheme to drain electrical energy from American subway tunnels, Drillhorn created an access to the underground network by drilling through a city street, with the debris he left behind derailing a passing train.Big City - Underground Terror
Zone catalog
As part of Liokaiser, Drillhorn was revived from death by some means. Lead by the reborn Dark Emperor Deathsaurus, Liokaiser joined several other powerful Decepticons in an assault on planet Zone. Attempting to steal their Energon Z, the Decepticons proved no match for the Micromasters and were driven away. Zone Project Story
Victory manga
Drillhorn was seen wisely hovering in the background when Deathsaurus learned Leozack had disobeyed his orders and gone to Earth alone. Leozack Rumbles Violently!
Drillhorn and the rest of Breastforce dramatically charged into battle against Star Saber, outnumbering him 4-to-1. He then mowed them all down with a single strike from his sword. Oops. Warrior of Love, Star Saber!
Liokaiser once tried to destroy Star Saber and Jan, but failed because the Breastforce lacked the proper spirit of cooperation. Drillhorn and the others argued internally over which of them would deliver the final blow, giving the Autobot Supreme Commander time to rally against them. The Star of Friendship, Jan and Star Saber! On another occasion, the Breastforce fled the scene of a battle after Star Saber and Road Caesar forced Liokaiser to disengage. Shine! The Five Stars of Victory
In the finale battle, the war came to an end after the Autobots discovered Drillhorn and the other Decepticons were only trying to defend and energize their civilian families and loved ones aboard the Stronghold. Heroic! The Victory War
IDW Generation 1 continuity
Drillhorn was part of Deathsaurus's contingent of Decepticons stationed in their Warworld. In agreement with Tarn, Deathsaurus and his forces joined with the Decepticon Justice Division to continue the Decepticon dream and eliminate Megatron. The Permanent Revolution
Toys
Victory

- Drillhorn (Breastforce, 1989)
- Japanese ID number: D-334
- Drillhorn transforms into a four-treaded drill-tank (the drill doesn't spin, sorry). His packed-in partner Hornbreast fits securely on Drillhorn's chest in either mode. Drillhorn can also use Hornbreast as a hand-held blaster. Drillhorn forms the left leg to the group's combined form Liokaiser.
- This mold was used to make Rescue Force 3.
- Liocaesar [sic] (Multi-pack, 1989)
- Japanese ID number: D-335
- Drillhorn was also available in a complete six-piece box set of the entire Breastforce team. Each toy was identical to their individual releases, with the glaring omission of bio and Tech Spec cards for the individual members.
Generations

- Liokaiser (Platinum Edition giftset, 2016)
- Accessories: Weapon/Combiner extremities, Individual Destron weapons
- Released as part of the Platinum Edition Liokaiser giftset, Drillhorn is a redeco/new head retool of Combiner Wars Brawl, with his drill-gun originally included with BotCon 2016 General Ramhorn. He also comes with a double-barred rifle. As a Combiner Wars Deluxe limb he will be able to combine with any Voyager Class toys released as part of the same subline but is, of course, intended to be combined with his pack-in Destrons and "Dezarus" to form Liokaiser.
- Initial prototype photos show Drillhorn's drill-gun/vehicle cockpit installed on the front side of the tank mode, as opposed to facing the back like Ram Horn's/Nosecone's.
Notes
Foreign names
- Mandarin: Tzuān Thiēn Shǔ (Taiwan, 鑽天鼠, "Sky-drilling Mouse")
- Russian: Nosorog (Носорог, "Rhino")




