The great experiment that was the Republic of the Sphere has failed. Withdrawn behind the Fortress walls, the once-great power has become a silent, opaque remnant of its former glory. Without its influence, old hatreds have risen anew. As war once more rages across the Inner Sphere, new equipment strides across ancient battlefields. Technology, once stagnated by trade restrictions and peace treaties, now surges forward again, testing these new machines in the fierce crucible of war.
BattleTech Record Sheets: 3145 -- New Tech, New Upgrades offers players the record sheets for all the 'Mech, Combat Vehicle, Battle Armor and Aerospace designs detailed in the New Tech, New Upgrades section of BattleTech Technical Readout: 3145, many variants making their debut here. The Technological Advances and New Design Quirk sections from BattleTech Technical Readout: 3145 are included as well.
The 'Mech, Combat Vehicle, Battle Armor and Aerospace designs from the corresponding sections of Technical Readout: 3145 can be found in BattleTech Record Sheets: 3145 Unabridged.