Tactical Landscaping and Terrain Deformation

The game's own definition of terrain deformation is that it is a "warfare technology" through which "soldiers utilize specialized weaponry to reshape earth to their own strategic advantage." In an interview with GameZone, David Perkinson, a producer from LucasArts, explains that any player "will be able to use a tectonic grenade to raise the ground and create a hill."
He will also be able to then lower that same hill by using a subsonic grenade. From there, he could choose to throw another tectonic to rebuild that hill, or add on another subsonic to create a crater in the ground. The possibilities are, quite literally, limitless for the ways in which players can change the terrain.