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 comic
Drillhorn was seen wisely hovering in the background when Deathsaurus learned Leozack had disobeyed his orders and gone to Earth alone. Leozack's Rampage!
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. Star Saber, Warrior of Love!
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. 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, 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. The Grand Victory War
2005 IDW continuity
- First appearance: More than Meets the Eye #39

"You want me to come down there so you can kill me?"
"YES!"
"I'll be right there."
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 When Megatron was lured to the Necroworld, Drillhorn was a member of the assault team that went after him. How Bright Their Frail Deeds
Following this battle, Deathsaurus ceded control of his army to Nickel. The rogue contingent of Decepticons retreated to the barren world of Frayus, where Drillhorn and his teammates displayed the ability to form Liokaiser during a shootout between the Galactic Council and the Black Block Consortia. Journey's End
Games
Transformers: Earth Wars
- Class: Warrior
- Lowest Star Rating: 2 Star
Toys
Fight! Super Robot Lifeform Transformers

- Drillhorn (Breastforce, 1989)
- ID number: D-334
- Known designers: Takashi Kunihiro (TakaraTomy)
- Victory 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] (Breastforce gift set, 1989)
- 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.
Combiner Wars

- Liokaiser (Platinum Edition giftset, 2016)
- Accessories: Drill attachment, double-barreled gun (black), hand/foot/gun
- Generations Combiner Wars Drillhorn is a redeco and new-head retooling of Combiner Wars Brawl, transforming into a tank of indeterminate, probably-made-up model. Instead of a cannon-barrel, he comes with the (non-spinning) drill attachment included with the BotCon 2016 General Ramhorn and Hasbro's Combiner Wars Nosecone. Unlike those two, however, his tank mode is in the normal Brawl orientation with the drill replacing the cannon-barrel, rather than putting the drill on the back of the turret and turning the whole mode around as with Ramhorn and Nosecone. This drill attachment can also be a hand-held weapon in robot mode. He also comes with a black redeco of Combiner Wars Air Raid's double-barreled blaster.
- As a Combiner Wars Deluxe limb, he can combine with any Voyager Class toys released as part of that subline or the Unite Warriors line, or form one of Legends Godbomber's legs, but is of course intended to be combined with his pack-in Destrons and "Dezarus" to form Liokaiser. His nominal placement is as the left leg.
- Unlike the original toy, Drillhorn is designed to have his leg mode facing forward as opposed to facing sideways. While it can be attached sideways to achieve a look similar to the original toy's design, doing so will rob the Combiner of its functional knees.
- Drillhorn was only available as part of a boxed Liokaiser giftset, the only Combiner Wars "Collection Pack" that's co-branded as part of the Platinum Edition range. In the United States, this set was officially exclusive to online retailer Entertainment Earth, but was also stocked by competitor BigBadToyStore, which obtained its stock through Asian vendors. In Hasbro's Asian markets such as Hong Kong and Singapore, it was available at general retail. Additionally, it was also sold at Ripley stores in Chile and at Myer stores in Australia, whereas in Canada, it was available via the Canadian Walmart website, but never sold in stores.
| Combiner Wars mold: Brawl | ||
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Notes
Foreign names
- Mandarin: Zuāntiān Shǔ (Taiwan, 鑽天鼠, "Sky-drilling Mouse"), Dújiǎoshòu (独角兽, "Unicorn")
- Russian: Nosorog (Носорог, "Rhino")



