So I guess as a follow on from my worst-written faction, which of the mainline factions would you consider to be the "evilest"?

I'd probably have to go for the Fallout 2 Enclave myself. While both Caesar and the Master have a grand vision which they commit the crimes that they do in the name of, the Enclave (descendants of those at least somewhat responsible for the destruction of America in the first place) seem to be running a huge superiority complex, and without spoiling the game too much for those who haven't played it I personally couldn't find a good reason for their genocidal intentions.

I would type out a full out opinion, but you've already said it best. I guess our moral compass is extremely similar.

Gonna have to disagree with the opinion on the Master @Nocthesis He is the greatest evil the Wasteland has faced. Sure the Enclave had a massive mightier than thou thing going on, but at least they were under the impression it was for the good of America. They at least believed they were the good guys. The master knew he was monster, knew the mutants were monsters. Hell, his legacy still lives on today, ironic being that mutants were infertile, in the children of the Master AKA Gen 1 Mutants like Marcus, Lilly,DOG(GOD), Keane and Tabitha.
These creatures can range from misunderstood, to just outright bastards. The Enclave in 2 were tyrants but the Master's casualties still live on in the wastes, not only in the people who fear the mutants, but in those mutants that survived. They have to live with the guilt of surviving and realizing "Shit...we were the bad guys". The actions of one man changed the entire wastes, much like the Vault Dweller, The Chosen One, The Lone Wanderer, The Courier, and The Sole Survivor. The Master, and his army , will always be the baddest of the bad because he did what no other faction could do. Despite his death, his ideals live on with the mutants that still wander the wastelands.

None other than the Children Of Atom. The Master wanted to infect everybody with FEV to turn them into super mutants, the CoA want to give everybody radiation poisoning and eventually turn them into feral ghouls, their aim is the same.

Sure it's their religion, but they enforce it on everybody both in Broken Steel and Far Harbor. I had a great time nuking the Nucleus to smithereens and killing Mother Curie II and all her followers.

Honestly, who the fuck worships an atomic bomb?

All the atrocities committed by these retards:
- Infecting pure water with radiation
- Assumably turning most of their own followers into ghouls
- Killing their own members (Zealot Richter having his own men kill each other in Far Harbor)
- Attacking any disbelievers, including the Sole Survivor in the Commonwealth (not in Far Harbor if you're not hostile)

"GIVE YOURSELF TO ATOM"
"STFU CONFESSOR CROMWELL" *shoots confessor with fat man*

I'd say the Children of Atom are fools. Evil maybe, but not in their eyes. Never played the earlier titles, so I'd have to go with the Legion.

A funny bonus pick would be the Think Tank of big mountain (BEST DLC). They wanted to take over the entire wastes with their mighty pincers!

@"Corvo" Weren't the Children of Atom from Broken Steel a splinter group? I was under the impression they were a more radical splitoff group because they actually actively wanted to turn people into ghouls. I could be wrong idk.

@"ZombieRedNeck" We might have to disagree. I mean I do have some common ground with you, in my opinion the Unity was - without a doubt, the greatest existential threat the wasteland has faced. You see that yourself in the endings for Falllout 1 if you act too late in stopping the Master, with his created super mutants going on to destroy much of what has been rebuilt since the great war. I think my points of contention are twofold; first of all I do genuienly believe the Master did what he did for what he envisioned as being the greater good - after all, if you show him his mutants are sterile, he'll go ahead and commit suicide. Second of all, he doesn't actually want to exterminate all the members of the wasteland, the ones who don't turn into muties will simply be left sterile. Compare that to the Enclave who want to murder everyone who isn't genetically pure.

And I mean.. doesn't the Master kinda have a point? The pre-war world did after all lead to the near destruction of humanity. Isn't a new order preferable to resurrecting the old order which ended in disaster? (Enclave & NCR). Idk, that's just my opinion