BattleTech is a science fiction tactical wargame in which players maneuver giant fighting robots ("BattleMechs," or "'Mechs") against each other (or vehicles and/or infantry). The game system includes details such as varying weapon ranges, heat generation, and discrete hit locations (torso, arms, legs, etc.). 'Mechs vary greatly by mobility and firepower, and players can choose from provided designs or take the time to create their own 'Mechs from scratch. The base game (reprinted in many different editions) includes an introductory rulebook for new players; recent editions also include quick-start rules for an even faster orientation. The game is typically played on one or more mapsheets or (more recently) mounted map boards, and there are many mapsheet and "hex" (mounted-board) packs available for purchase or even download. Optional rules are also available for hexless play a la many miniatures games. An extensive line of pewter figurines ('Mechs, vehicles, and the like) are available in the United States from Iron Wind Metals. (Many earlier BattleTech figures were produced and sold by Ral Partha, which still handles the figure lines in Europe.)
The main component of the current generation of BattleTech is a series of core rulebooks, the central one being Total Warfare (in print and PDF), which contains the main (tournament-legal) rules for the game. (The 2011 Catalyst reprint is up-to-date in terms of errata fixes.) TechManual (in print and PDF) contains construction rules for 'Mechs and other units. A series of three "advanced rules" books adds on to the standard rules: Tactical Operations (in print and PDF) covers on-planet actions over a period of hours; Strategic Operations (in print and PDF) covers in-system actions over a period of weeks; and Interstellar Operations (forthcoming; 2012?) covers system-level actions over a period of months. The final core rulebook available is A Time of War: The BattleTech RPG (in print and PDF), a revised version of the BattleTech RPG rules, which have previously gone under the names MechWarrior and Classic BattleTech RPG. A one-volume tome on the BattleTech universe was announced years ago but has no scheduled release.
BT is also supplemented by a variety of Technical Readouts, which provide gameplay and background data on 'Mechs and other units at various time periods in the game-universe history; map sets, including the new Hex Pack hard-mounted maps with tile overlays; sourcebooks; and pregenerated record sheets, as well as the aforementioned miniatures (which are not required for play).
As in earlier editions of BattleTech, the current generation includes an introductory box set. The current version (released Q1 2011) is the 25th Anniversary Box Set, which features everything necessary to play the game, including:
24 unpainted, ready-to-play plastic BattleMech miniatures.
2 unpainted, premium-quality plastic BattleMech miniatures.
One 12-page full-color quick-start rulebook
One 80-page full-color rulebook
Inner Sphere at a Glance, a 56-page full-color book of universe background and BattleMech technical data
A 36-page book of pregenerated BattleMech Record Sheets
One 16-page full-color Painting and Tactics Guide
Two heavy-duty cards of compiled tables (Many sets came only with one.)
Two 18″ x 24″ double-sided game-board quality maps.
In 2009, the adjective "Classic" was dropped from the BattleTech line.
Battletech Introductory Box Set
Classic Battletech: Total Warfare (Standard Game Rules)
Classic Battletech: Tech Manual (Standard Unit Construction)
Classic Battletech: Tactical Operations (Advanced Ground Rules & Construction)
Classic Battletech: Strategic Operations (Advanced Aerospace Rules & Construction, Complete Battleforce Rules)
A Time of War: The BattleTech RPG (RPG rules)
A Time of War Companion (RPG supplement)
Battletech: Alpha Strike (Fast-Play Rules)
BattleTech: Interstellar Operations (forthcoming: 2014?)
Technical Readout: 3039
Record Sheets: 3039 (print version is abridged; PDF is unabridged)
Classic Battletech Starterbook: Sword and Dragon
Battletech Hexpack: Lakes and Rivers
Battletech HexPack: Cities and Roads
Battletech HexPack: Mountains and Canyons
Other Supplements (partial list)
Classic Battletech: Dawn of the Jihad
Battletech: Chaos Campaign
Classic Battletech Starterbook: Wolf and Blake
Classic Battletech Map Compilation 1
Classic Battletech Map Compilation 2
Classic Battletech: Mercenaries Supplemental
Rules Expansions for Previous Editions (partial list)
BattleTech: AeroTech 2
Classic Battletech RPG