TechManual A companion volume to Total Warfare,â„¢ the Classic BattleTech TechManualâ„¢ combines all the construction rules for the various units presented in that core rules set. Streamlined and updated, it contains all the core weaponry and equipment from previous rules set, as well as the newest, bleeding edge technologies. More than just a rulebook, however, the TechManual presents numerous sourcebook-style treatises, providing the in-universe context for these units and the technologies of their development. A must have resource for any BattleTech aficionado! The photos below are featured in TechManual.