I was brainstorming some ideas for different factions last night and I didn't want to spam you steam messages so I decided to just put them all here for you to read when you aren't busy.
Faction Name: The Zealots
Short description: A coalition of loosely affiliated groups made up of prewar preachers recruiting survivors for a holy war against the unpure: ghouls and mutants.
General technological level: Mostly improvised weapons like pipe guns and leather armor
Level of training: Little to no military training, but can occasionally have trained soldiers in their groups.
Usual territory: Rural areas, they tend to take over smaller towns, and fortify prewar churches
Strengths: Due to the simplicity of their message they have large numbers of devout followers, who are whipped up into an almost suicidal frenzy resulting in tenacious albeit poorly equipped fighters.
Weaknesses: They are limited in terms of equipment, the best they have is a small number of 10mm pistols and shotguns. They are generally offputting due to their preaching and tend to not be well liked by other factions.
Faction name: The Damned
Short description: Survivors of the Great War turned into ghouls by the intense radiation. They are shunned by practically everyone due to their appearance, and tend to keep to themselves.
General technological level: Slightly above average, they tend to use an arsenal of scavenged civilian weapons, and armor, rarely have military grade weapons and armor.
Level of training: Varies wildly, can have ghoulified soldiers, or just regular civilians. Due to their usual habitats they tend to eschew standardized training thinking the radiation alone is enough to protect them.
Usual territory: Highly irradiated areas regular humans cannot go like nuclear power plants, and city centers.
Strengths: Due to their ability to be healed by radiation they can scavenge in areas unreachable by regular humans, and aren't attacked by feral ghouls
Weaknesses: They are on their own due to their appearance, almost no one is willing to even talk to them, most just shoot at them on sight.
Faction name: The Prepared
Short description: A catchall term for preppers, and conspiracy theorists who knew what was coming, and prepared for it, building bunkers and stockpiling supplies.
General technological level: Civilian grade weapons, and armor, some improvised automatic weapons, and combat armor
Level of training: Tend to be well trained in survival, and in combat. They specialize in hit and run warfare using their knowledge of their home terrain to defeat attackers.
Usual territory: Small towns in the mountains near their protective bunkers
Strengths: Well trained, and well equipped, they operate out of hidden bunkers deep in the mountains making them a formidable foe.
Weaknesses: They are paranoid, and few in numbers. They are extremely slow to trust, and even slower to grow their numbers.
Will add more later.