Heavy Duty is a gametype featured in Call of Duty: Ghosts. The mode features a mix of Team Deathmatch, Blitz, and Domination gametypes. The major difference is that health is increased by 30% from standard gametypes. As of January 28th 2014 (29th on PS3 and PS4) the Heavy Duty mode was removed from the Core public lobby and replaced with Gun Game. It's still available in Private Matches by changing health to 130.