The Screenshot above depicts the editing tool that can be used to modify aspects of the game.
You might remember a slightly old game that went by the name "Battlefield: Bad Company 2". Originally released in 2010, Bad Company 2 was the sequel to DICE's spin off game "Battlefield: Bad Company" and featured large maps with destructible environments, the game was replaced in 2011 as the lead title of the franchise by Battlefield 3.
Fast forward to today, and part of the community hasn't forgotten about Bad Company 2's existence in a sea of first-person shooters. For two years, NoFaTe and the community at Emulator Nexus have been working on reverse engineering the game and discovered not only that the maps can be modified with some effort, but that alongside the leaked server files, map layouts, vehicle handling and weapon multipliers could be altered to change the way the game plays out.
The video here displays a changed map layout, modified attack rockets physics and improved chopper handling.
On the server side however, things are a bit more complicated. The software technically isn't a direct modification of the game files, but more a simulation which is run on both Windows or Linux-based servers.
Instructions on how to setup a server can be found here.
According to NoFaTe, the mod tools are still in late beta stages and is still not complete, but the potential is certainly there.
If you'd like to join our discussion on this subject, visit this corresponding thread.