With the excitement for Golden Century, I've been inspired to share my personal list of those units and equipment which have been mentioned once or twice in some source somewhere, but never fully stated-out or given art. I hope someday all of these will appear in print.
So here is my list, what is yours? Did I make any mistakes? What did I miss? Bring on the weird stuff!
General List
Air Car (probably two versions; Hover and VTOL) (MW1E)
Amarok---Wolf Design mentioned in Hammerhead Fluff in Rec Guide 5Amphibious Assault Ship, Waverley---Has two sisterships Ellis and Cuthbert; can launch smaller craft, mentioned in Scorpion Jar
Aquatic Clan Exoskeleton; Elemental precursorArcher---TRO 3025 notes *6* extant Archer variants in production at the time of printing, but only 4 are known in terms of stats or other fluff.
Arrow-IV Carrier---I swear we had a basic Arrow-IV Carrier with two A4s on an LRM/SRM Carrier chassis, but may just be the semi-modular version with the Ryuken-Yon from FM:DC described below.
Artos Mech---Children of kerensky Novel Errata'd into the Stormwolf
Athalwolf Mech---Children of kerensky Novel Errata'd into the Amarok
Atlantis Arcology---on atreus, 10kph cruising (TacOps)
Atlas AS8-K ---Rec Guide 7 War Crow Writeup, Ballistic-Reinforced ArmourAvalonmax-class freighters---Touring the Stars: Rigil Kentarus.
Awesome AWS-11H Triple HPPC from HB: HMBaby Sylvester Dropship
Barghest Gray---Major Gray of 20th Aucturan, during the JF Incursion has the Barghests under her command modified by swapping the ER LLs for Clan Gauss Rifles.
Bauer Enterprises Heavy LAM which lost out to the Phoenix Hawk LAM
Black Eagle Mech Carrier---Variant of the Vehicle Carrier, no recordsheet.
Brookes Incorporated three-man digging/drilling machine (2940)
Bulker Sea-Going Dredge---Mentioned in Fortress of lies; capable of deploying mechs in amphibious assaults through the chutes for the spoil(Right term?) Dross?
Callisto battlearmour---Children of kerensky NovelCameroon (Ice Hellion --> forerunner of the Icestorm)
Carrack Carrier Variant---1st SW
Cherrypicker Agromech (later GDL book)
Chimera Prototype ASF
CI-117 APC---Cyclops Industries Product, HB:HS Cyclops Industries profile
Clan APC Sub
Clan Behemoth DS from TRO 3057---ER Lasers
Clinoa-Class Frigate (Wet Naval Escort for the Meabh)
Clipper-Class Cargo-carrying jumpship. Free Flight Limited Project/product
Coanda PSC---Skye Pleasure Craft Sport Racing WiGE (Techmanual)
Colt Conv Fighter (SRM)
Comitatus---JS (Freighter and Downgraded Cargo Variants)
Command Van (MW1E)Crusader; SLDF Jumping version (the same as had the Hawk Missile Systems, but otherwise similar to the 3L)
Cyclops I---Wolf's Dragoon's space station; drydocks for jumpships and dropships, recharge batteries.
Cyclops Mastodon Hover Transport---"Armor and Infantry" Transport in development in 3067 with AP Weapons and "lighter-than-normal" Armour (Techmanual)
Daemon (SLDF Prototype)
Daemon---Norse Storm mech intended to replace the Spector in production.
Dagda Mobile Atolls
Danais (industrial) Mech Carrier---Blood will Tell
Delta---Early prototype Protomech used in action by the Smoke Jaguares in limited numbers, Mentioned on pg 26, Twilight of the Clans Campaign Book.
Deuce-and-a-Half (Davion "Half-tracked" version of the Bulldog or a similar vehicle)
Dropship Crawler (Mobile structure example)
DroST I---Implied Dropshuttle-bay-capable 5000t variant of the DroST
Durandel Destroyer---FM:FS
Dust Rat---Wolf's Dragoon's 6-wheeled recon car from Wolf Pack
Erinyes (WOB Super Weapon with Heavy Mass driver, based on a newgrange)
Evironmentally-specialized pre-Elemental BA (unknown if there were others at this time)
Explorer Jumpship; HPG and Sub-Cap weapons variants---found mentioned in House Marik Section of TRO3075 and in the MUL
Falcon Hovertank (CityTech 1E)Falcon's Roost Orbital Complex
FDC APCs---Shadows of War, chapter 20, modified APCs used to coordinate artillery fire.
Fire Moth Infantry carrier
Fireship---Historical Reunification War, Taurian campaign, likely used and referenced elsewhere. Common cargo ships as suicide ram-ships, equipped with conventional or nuclear bombs.
Florence AmbulanceMech
flying airbase (Mobile structure example)
Fox (Sea Fox/Diamond Shark)Fusion-Powered Aquamech (Mentioned in Ghost Wars TRO)
Gatekeeper Space Station
GHR-1X Ghost Hunter---failed, boondogles-esc prototype of the Grasshopper, possibly with flawed-CLPS/NSS or other stealth system
GHR-4R Grasshopper---From the BC story "A soldier's priviledge" and reconstructed here
https://bg.battletech.com/forums/index.php?topic=55136.msg1269114 from data in the story
Girder GRD-9 Contructionmech---P.10 Dark Age INN compilation, 3132 with a welder, Tikonov/EarthWerks
GM MuckRaker Same as regular MuckRaker?
Goliath CGraf-Tengu Air Transport from Objectives: DC
Grand Crusader II Omnimech---Abandoned in favour of the Celestial series.
Gray Monday BA (unidentified BA used in the Gray Monday attacks)
Griffin CGround Car (MW1E)
GS-54 Guard Quad 15-ton SecurityMechHaepheastus-class station
Heavy Transport B1 (MW1E)
Heavy Weapons Carriers (HTP: Glengarry) LRM, SRM, AC Laser variants
Hector--- DS 1800, test bed for M2 Caspar Drone
Herdsman AgroMech mentioned in TRO: 3075.
Hermes and Hermes II---Version with vehicle flamers as an early holdover or a field modification, in order to come in line with fluff descriptions
Hermes II HER-2K 'Hermes III'---Mentioned advanced-tech predecessor of the HER-4K; 2x ERLL, Flamer, DHS
Hermes II---Illegal CT AC and Arm-Mounted AC Prototypes
Hessen Tank--CC, Mentioned in XTRO III, Korvin Precursor.
HK17 APC---Heir to the Dragon
hood class cruiser---Wet-Navy Cruiser mentioned in gameplay examples in Combat Equipment, Pg.97, 136
Horned Owl Precursor---Rec. Guide 1 an aquatic constructionmech
Hover Scout (RS V5: Vehicles)
Hover Weapons carriers (HWC-A from RS: Vehicles and MUL) LRM, SRM, RL, Rifle and AC Variants, 25T
Hughes-class mobile yard station
Hunchback IIC IS Refit---mentioned in TRO:3058R/U---IS Pilots normally refuse to pilot an Hunchback IIC unless or until one of the UAC/20s has been removed and replaced with armour and other equipment.
Hunchback HBK-2---Mentioned in Hunchback IIC Fluff as it's basis.
Hunter Wheeled Assault Tank; 20T, PPC, Vox 130 Fusion, 129.6kph---TCI Shadowhawk/Scorpion model kit
Hurricane Air/Hover car---Cyclops Industries product, HB:HS Cyclops Industries profile
Hussar MLs and Armour variant---TRO3050R. Drops the LL for 2xML and more armour. Possibly also an electronics system.
Ice Ships; ala the "Ryan Cartel"
Inferno---Davion Heavy Mech Mentioned in Rec Guide Warhammer Writeup, has one or more PPCs---included in Rec Guide 9
Jarvis Prototype mini-sub
Jeep (MW1E)
Jenny ASF trainer (Original House Stiener SB, under Nagelring entry)
Jet Sled (MW1E)
Jian-Class Dropship---Children of kerensky Novel
Jonah Mini-Sub (Space Version)
Jupiter Variant from Sword of Sedition, likely as stated here;
https://bg.battletech.com/forums/index.php?topic=70258.0;topicseen by @Templar87
Khirgiz; earlier version with SFE, possibly non-omni.
King-class 90-ton CargoMech
Konito mech---Children of kerensky NovelLanding Craft---Smaller versions as mentioned in Scorpion Jar; versions for vehicles and much-smaller version for a Squad of regular or unarmoured infantry---probably a typo; if you can carry 4 BA; that's more like a platoon of unarmoured infantry.
Large and Small Mech Landing Craft---From Liberation of Terra II.
League DS (GDL Books)
Leander II Naval Support Vehicle---Hexareme TRO
Leopard, Union, Overlord and Excalibur Passenger/Cargo Conversions---Various novels, especially MWDA
Leopard-Combined Arms (Removes 2 ASF for some # of Infantry/Vees)
Liberty Space Plane
Light wheeled weapons carriers (Some attribution in fiction, particularly Decision at Thunder Rift) 20-40 tons, PPC, Laser, Missile, AC, Rifle, Thumper, RL
Lightning---Rec Guide 7 War Crow WriteupLine Holder LH10---A New-Whatever design.Longinus C---3150Locust, PPC-Armed---attributed in first printing of TRO 3025; a Davion-Variant that falls down when it fires.
LT-MOB-50 Rail Mobile Longtom
Lugger 80-ton battlefield salvage ’Mech
M1 Drone
M2 Drone
M6 Drone
M7 and M8 drone stations?
M10 Drone
M11 Drone
MkIV, V and VI Landing Craft---Implied and mentioned in Mk/Ares-Series Landing Craft Write-ups.
Magellan II---variant depicted in Technology of destruction; has a grav deck, likely a single docking collar and multiple shuttle bays
Manazuru Conventional Aircraft from Objectives: DC
Marauder/Marauder II ---Barber's Marauder IIs' custom ClanTech and advanced-tech versions
Marauder II Ballistic Weapons Variant---TRO 3050, takes of advantage of useless CASE in wrong torso.MaxTech ICEMech---depicted on cover
MicroTitan - Ultralight digging Mech
Minsk (Ghost Bear)Mobile HPG
Mobile Mining Refinery MMR (Support Vehicle, Drone/Automated Control optional, from the new beginner's set included fiction: Golden Rule)
Monza Light Cruise Liner---Federated-Boeing Interstellar (Techmanual)
Mosquito Radar Plane '52-Model (Techmanual)
NAIS Light Scout/SF Suit---Showcased on huntress. stealthy, infantry weapons and equipment, possibly squad support weapon. Uses thunderstroke, SRM and manpack PPC.
Nighthawk NTP-2P---House Stiener SB P144, said to be a downgrade model
NL-Series Gunboats---Mentioned in NL-42/45 write-ups; the NL-42 and then the -45 is noted as the latest in a series of NL-series gunboats designed and used by the Star League.
NETC Skyhook heavylift VTOL (Techmanual)
Nova Luthien---SMR-4, 3+ ERML?
Ogotai---First Diamond Shark ASF 2874Okinawa---Balanced-armour first production version---TRO:3057
Omega Sea Floor Miner---a discontinued product from the Power Systems division of Curtiss Hydrosystems, HM: FWL Pg.129
Omni-Corvis (DOH!)One-Mech Transport Shuttles---Robinson-Class Transport (Warship) in TRO: 3075
Orion C---3150Ostroc OstWar Arms Variant---Simply an Ostroc which visually matches the original art due to fitting of Earlier OstWar arms. May or may not have two arm-mounted SRM4s, vs 1 in the Torso.
Oscar atmospheric fighter, mentioned in the Kraken Unleashed entry of Mercenaries Supplemental Update, p.80
Overlord-2 (Converts 12 Mech Bays to 12 Heavy Vee Bays + Cargo)
Overlord-Command (Converts 4 Mech Bays into "Command Quarters")
Overlord-CV (Converts ?? Mech Bays to ?? ASF Bays)
Pallas---Long lost assault mech ~90-95t, mentioned as part of a Frankenmech in Redemption and Malice
Peregrine WarshipPiledriver Dropship variant---Children of kerensky Novel
Pit Viper---old ComStar sourcebook mentions it was one of two first mech models designed by Word of Bake engineers and produced at Gibson Federated BattleMechs factory (the other being Grand Crusader).
Planet Lifter-Support Variant---MUL-listed entry without stats or AS card, from TRO: Prototypes P.160, variants
Prime Mover (MW1E)Project Trojan HDHB --- Stealth Dropship
Purifier Police---described in the Purifier Terra entry, but nowhere statted out.
Qasar---First Novacat ASF 2905RanchHand AgroMech in “Callie’s Call”
redhawk gunship (mentioned in the Proliferation Cycle)
Reudel Conv Fighter (Hearts of Chaos)
Rhino early Clan Heavy Battle Armour (How did we miss this one!? Ah well; done now! :) )Rifleman RFL-4DA1---Mentioned in Shrapnel #4; Field Refit, 2 ppcs, extra armor & heatsinks. Featured in the story "Bye Bye Brigade.
Rimrunner submarine, TRO:VA p. 172
RiotMech - (Appeared in MWDA Novel Fortress of Lies)
Rising Star---Low-production forerunner to the Legacy
Savage Wolf Hyper-Laser Variant---Mentioned as a special RAF raiding mech in IO:AE
Scout DS (GDL Books)
Semi-Modular Weapons Carriers---Variants on the classic LRM/SRM carriers that could take Arrow IV Missile Launchers in their weapons bays in a semi-modular fashion. Possible Omnivehicles? Mentioned in FM:DC as in use with the Ryuken-Yon.
Shadow-Griffon---Betrayal of Ideals, elsewhere? A Semi-regular frankenmech design
Skimmer (MW1E)
Slither---Another mech mentioned only in Redemption and Malice; Rim Worlds, so it seems.
Sovereign class cruiser (depicted in Tac Ops, Pg161, 245)---based on a 3rd-party model of a Sovremmny-class IRL destroyer
SpaceStream Smallcraft from Objectives: Lyran Alliance
Spector Christian---From Chaos Irregulars stories
Spectre Clan Survielance Plane---Look Down Radar Write-up
Spectre BA---Dragoons variant from Redemption Rites, Pgs 247, 250 and 252, 253. Has an AP Gauss vs the Light Gauss, but appears to keep everything else, with the possible exception of the mag clamps.
Speeder (MW1E)
St. Florian 90-tonStar League Floating Islands---GM Skycity-3000, Lyran "Skycity" (TacOps)
StarCorps Muskrat-379---SupVee Aircraft, Amphibious, prop-driven, STOL, Water-tanker firefighting aircraft with look-down radar, hi-res cameras and Thermal. B-Model is optimized for passengers and camera equipment as a recreational parachuting aircraft (Techmanual)
StarCorps Smoke Ultralight Trike SupVee Aircraft (Techmanual)
Stealth Karnov
Storm Giant (Scylla Predecessor) (YES! Very excited to have this now!)Submersible Aircraft carriers---Built for the SLDF by Sungdong-STX Shipbuilding, TRO: 3085 Supp. P18
super-freighter (Mobile structure example)
suvurov ICE tank
T-420 Hovercraft APC (Earthworks)---2 squads (12 pers), turreted laser, "Dreyfus" Support Machinegun
Takashi battle tank---tracked tank with multiple Gauss Rifles. From Angry Voices in the Dark
Tempest C---3150Terraforming ships---may have a mechanical part in the process, may just be a designated transport.
Thug AC, At least 1 SRM-4, at least 1 PPC swapped for an autocannon. Bush Wars art. Makes sense as a SW-mod.
Thunderbolt TDR-12R---Rec Guide 6, ROTS Steath Mech, built on Tinkonov)Tigershark fighter
Tigershrike ICE Hover
Trader-Class Primitive Jumpship---Fall Down Seven Times, get up eight, must have had Dropshuttle Bays.
https://www.sarna.net/wiki/Trader_(JumpShip_class)
Trailblazer Exploration ship---Star League sourcebook, p. 60, Crew: 479, HPG equipped, Had three jump drives, all linked to a central control computer through a single circuit junction. Launched 2655 to map and survey unexplored star systems. Major Boondoggle bait right there.
Traveler-class aerodyne mail shuttle, in use in the FWL in 2466, predating the HPG. It's stated to have a crew capacity of 2-3, and can be flown by a single pilot.
Troglodyte; the true name of the SLDF tunnel/subterranean tank mentioned above---Seems it's in the Manta/Moray entry P18, TRO: 3085 Supplemental
Union-Combined Arms (Removes 2 ASF for some # of Infantry/Vees)
Union-CV (Converts 12 Mech Bays to 12 added ASF Bays)
UL-14 Bulldozer---TRO:VA(R) p. 34
Un-named Raven Alliance Omnimech---Mentioned in War Crow Fluff ---This turns out to be the Carrion Crow
Unnamed Strike Cruiser-class built by the Federated Suns---Periphery 1st ed, Pg.28
Una/Uma Jumpship---Explorer Corps
Urbanmech Riot-Control Variant---Mentioned in Illusions of Vistory, armed with "Water Cannon"
Valiant Regal sportster; Handbook: House Davion pg 175
Valkyrie (Royal version)---Mentioned in the Writeup for the Masauwu's notable pilot---Seems the name was a mistake?
Venturer WS Word of blake prototype destroyed over loyalty by sabotage
Vision Quest (Nova Cat)Voss Conv Fighter (Hearts of Chaos)
Wakusei no Mochiagerumono Conventional Aircraft from Objectives: DC
Warlock---Golden Age Coyote Assault-class omni. no details beyond name and weightclass
Wheel Space Station of the Wheel System
Wheeled Scout (RS V5: Vehicles)White Raven---Rec Guide 7 War Crow Writeup, Ferro-Lite Armour, mentioned in Divided We Fall as being a revamped design; faster than 4/6, 75t, removed pulse lasersWoden Space Defence Station
Woodsman (Dual Arrow-IV)---Naga precursor
Yangtze Air Transport From Tengo Aerospace in Objectives: CC
'Zilla---Defiance-built demolition mech competitor, apparantly more mobile and thus likely uses a fusion engine.
Zephyr-Class Airship---400 Tons, the named "Marsh Owl" is described in 25 years of art and fiction. A luxury ship with a cargo bay that can physically hold a company of heavy and assault mechs (but couldn't lift them)
Zoomer Elemental transport sled from Wolf Pack
Ye Olde Apocryphal designs from the Magazines that could be/need to be canonized/re-canonized
Achilles ACH-09S---Battletechnology 18
Alliance ALI-1A---Battletechnology 7
Ambassador MBSDR-1---StarDrive V1N1
Apollo APL-1J---StarDrive V1N1
Ariane ARN-E1---StarDate V3N3
Athena FDC Carrier---Battletechnology 8
Avalon Arms Support System---Battletechnology The Early Years
Avatar AVT-7A---Battletechnology 21
Badger-Class medium tank (obsolete basis for SP Sniper, using the same SLDI TRK/5(B) Chassis)---Battletechnology 0204
Bandicoot KGR-BCT---Battletechnology 19
Behemoth BMH-1T "belfry"---Battletechnology 11
Boomer BMR-100---Battletechnology 19
Brawler Mech---Battletechnology 13
BRN-1 Brian---Battletechnology 13
Bushido BSD-7K---Battletechnology 18
Cavalier Class Dropship---StarDate V3N3
Centurion Maximus CNT-9---Battletechnology 15
Cerberus CBR-6S ASF---Battletechnology 10
CGR-1A2 Charger-KH---Battletechnology 13
Chimera Ch-1M "perfected quad mech"---Battletechnology The Early Years
Clytemnestra CTP-005---Battletechnology 20
Cobra FrankenMech---Battletechnology The Lost Issues
Common Chassis vehicles 100, 75 ton tracked and 50 ton Hover---Battletechnology 19
Cyclone F-95---StarDate V3N3
Dervish DV-7S---Battletechnology 11
Dwarf Wombat KGY-WBT---Battletechnology 19
Fisher FSH-9R Recon/Spec-Ops carrier mech---Battletechnology The Early Years
Foxfire FXR-4R---StarDrive V1N1
Gadfly GDF-L4---StarDate V3N3
Goshawk VTOL Gunship---Battletechnology 9
Gremlin Armoured car---StarDate V3N4
Gryphon Scout Hover Tank---Battletechnology 19
Guardian---Battletechnology 13
Guppy Scout Submarine GU-2P---Battletechnology 12
Harrier Hovertank---Battletechnology 0202Hedgehog---Also now attributed as the first Tripod in other sources. DO IT!
Huntress artillery mech (it`s got tracks, so I think TPTB would be into it for the MWDA connection there)---Battletechnology 14
Interloper Urban Scout URS-12A---Battletechnology 16
Iroquois Transport VTOL---Battletechnology 9
Javelin/Enforcer/Wolverine FrankenMech---Battletechnology The Early Years
Joey KGR-000---Battletechnology 19
Junior JNR-7P---StarDrive V1N1
Kangaroo KGR-00---Battletechnology 19
Ki-Rin VTOL Gunship---Battletechnology 9
Kookaburra KBA-01---Battletechnology 19
Leviathan LVN-1X "Belfry" A barely mobile wheeled tank---Battletechnology 11
Life-Saver Medivac VTOL---Battletechnology 9
Lynx LYN-5X (Basically looks like a shadowhawk variant)----Battletechnology 9
Malleus MLS-1A---Battletechnology 11
Mantis LAM---Battletechnology 15
Mauler Cititank---Battletechnology 16
Minnow Sub MNO-5W---Battletechnology 12
Mite MTE-12C---StarDate V3N6
Munin MN-1B LAM---Battletechnology 10
New Gladiator FrankenMech---Battletechnology The Lost Issues
Omega 137-A---Battletechnology 14
Original Titan(s)---Battletechnology 17, 11
Quicksilver Hoverscout---StarDate V3N4
Rampage RMP-1C---Battletechnology 16
Rattlesnake JR7-31P (Jenner laserboat variant)---Battletechnology 21
Rhino RHN-10 Melee Quad mech---Battletechnology 12Rifleman-K (Drops the AC/5s for two more Large Lasers, an SRM4 and 7 heatsinks----Battletechnology 9
Roo Scout RO-2A---Battletechnology 14
Royalty-Class Royal Yacht (Armed Jumpship Amaris Star/Lorelei's Hope)---Battletechnology 20
Screaming Hawk---Battletechnology 7
Shadow Hawk Spy (Spec Ops Shadowhawk)---Battletechnology 21 ---Canonized as the SHD-5S
Siren SL-23---StarDate V3N3
Sky Ranger High Schout Drone Carrier---Battletechnology 19
Skyhook 30ton Transport VTOL---Battletechnology 9
Slowpoke SLP-2U---StarDrive V1N1
Sniper ammo carrier---Battletechnology 0204
SP Sniper---Battletechnology 0204
Stiletto STL-7D---StarDrive V1N1
Striga Conventional Fighter STC-13---Battletechnology 12
Striped Bandicoot KGY-BCS---Battletechnology 19
SubUrbanMech---Battletechnology 18Sylph SYH-A5 Hovertank---Battletechnology The Early Years
Templar TMPL-1R---Battletechnology 15
Traverse TR-11A---StarDate V3N3
UrbanMech, Modified---Battletechnology 18
Ventilator VNT-1A---Battletechnology 15
Viking Hydrofoil---Battletechnology 0204
Wallaby KGR-WA---Battletechnology 19
Weasel WS3-L and Wild Weasel WS3-L2---Battletechnology 16
Whirlwind Hover Tank---Battletechnology 0202Wildcat Aerotanker from Battletechnology 10
Wisp WS-2P---Battletechnology The Early Years
Wombat KGR-W0---Battletechnology 19
Wyvern VTOL Gunship---Battletechnology 9
Zaibatsu-Class Orbital manufacturing Facility---Battletechnology The Early Years
"MechWarrior" Equipment
RX-30 SpyEyes---"small gadgets used by governments and militaries throughout the Inner Sphere, especially by the various security agencies. They were little more than a camera and a transmitter mounted on six walking legs, a primitive, battery-powered robot small enough to hold in the palm of your hand. Too slow and too fragile to be efficient as scouts in battle, they were invaluable as silent, near-invisible sentries around a military base."---Something like this could be modeled as a creature, rather than have a new set of rules for small drones/robots.
TK Industries HG-90 Gyrojets Rifle
SLDF bullproof uniforms---As described in the fluff, these wore and felt like normal clothing, but could stop bullets and lasers. May have been statted in the ATOW companion, but I am away from my books.
***AeroFighter Unlimited---The Star League, p. 131: "Weapons Industries - Manufacturers", Dark Age: Republic Worlds (3130), p. 194: "Oliver" planet profile, described as a "major munfacturer", but with no known products.
****AquaMechs exist as a sub-class of industrial mech, but have never been filled out.---"TRO-3130", MWDA: Ghost War makes mention of them, but we have no known examples of aquatic workmechs.