The New Combine is an organization which wishes to bring back City 17 to the "glory" days of the Combine. Although earth based, they use equipment similar to the Combine such as their attack choppers, drop ships and hunters, as well as dressing up in Combine attire as part of their uniform. They were the kick-starters of the New Combine Civil War in which they successfully took over parts of City 17, but were later defeated at the end of the New Combine-Russo War only under a year since their victory.
The organization was actually a front for the Clandestine Company.
Five years on from their original foundation, a new group known as the Pro-Combine Society were founded and got involved in a civil war with the resistance.