Its members and important characters for the assignment or completion of missions. Technicians for repairing or upgrading equipment. Doctors to buy or sell medical supplies and heal radiation poisoning or wounds. Its traders to buy and sell goods and equipment. If the player is on good terms with a faction, will have access to all the areas that it occupies on the map without having to put up a fight.
Also keep in mind that the closer to the center of the zone a faction is, the better equipped will be its members. This is influenced by the player's relationship with the faction occupying the area.
It is possible to increase or decrease the goodwill towards them depending on the behaviour, the level of hostility towards them and the faction in which the player is already in, allowing or denying to the player the right to access certain areas and traders without having to fight for it. All of them have a reputation system that can influence the gameplay in various forms and ways depending on the status of such relationships between eachother and the player. Factions play a very important role in Anomaly.