Until January 2015, it could only be used on singleplayer with mods.It cannot repair from loose items such as building debris.There must still be some part of the structure left for the Reconstructor to build from, such as flooring.It cannot repair explosive structures, such as hydrogen tanks or certain generators.It can, however, repair the frosted glass found on buildings in the Eos sector. It cannot repair most glass, such as windows and solar panels.The Reconstructor has several limitations: The Reconstructor has infinite ammo, but can 'overheat', similar to stationary turrets such as the Heavy Machine Gun Turret. Instead, it can be used to repair damaged or destroyed structures by reassembling them. The weapon does not deal damage in any way other than its secondary melee attack. It is primarily used in the Damage Control and Siege gamemodes in multiplayer, but is also available in singleplayer on the Steam edition and Re-Mars-Tered after completing the game, or in a new game on the PC version of the Re-Mars-Tered edition after importing a previously completed save game. There is a great guide on how to use NVidia Inspector here. The Reconstructor is a weapon available in Red Faction: Guerrilla. 1.) Use NVidia Inspector to remove the Red Faction Guerrilla profile 2.) Add the 'rfg.exe' executable to the Prototype 2 profile If you are unfamiliar with NVidia Inspector, I would highly recommend downloading it and learning how to use it.