Hard Terrain DLC includes:

• A whole new world with rains, muddy terrains, slimy fields for off-road fun
  
• Real-time ponds growing during rain
  
• Towbar for tractor pulling
  
• Building repair and rebuilding functionality, using predefined materials (barn as a prototype to repair/rebuild)
  
• Ladders to climb up the barn
  
• Motorsense to cut out grass and bushes
  
• Number of bugfixes and updates