Played through the rest of the series, kinda want more Fallout but not too much more. Couple questions:
-Is the single-player mode (Wastelanders?) fairly decent?
-Is there any separate purchase involved or can I just get the base game and install Wastelanders?
Don't think I'll be engaging in the MMO aspects or raiding, just want more single-player FO action after running out of other FO games.
Basically think of it as a modern MMO: You can basically solo through most of it and really only need to group up for boss fights (basically world bosses, completely optional although Scorch Beast Queen is tied to a main story quest). However, I would recommend you join a public group while playing. 99% of the time, the people you group with won't say a peep or try to hang out with you. However, you do get some perks for grouping (depending on group type, you might get a XP bonus or stat bonus). People in groups also share perk cards sometimes, so you can get some essentially free perk card bonuses while in the group. There are also some mutations, like Herd Mentality, that give you a +2 special stat to all bonus just for being in a group and strange in numbers perk that boosts the bonuses of mutations by 25% while in a group (this even works with stuff like marsupial mutation, letting you jump even higher).
But ya, buy the base game and you're all set. Wastelanders and the BoS stuff they added gives you a healthy amount of story content and quests to do. You can pretty much solo all of it if you want to. There are lots of areas to explore not tied to the main quests either and after you unlock some parts of the game as you progress, there are faction grinds if that's your thing to unlock new weapon schematics and stuff like that if you want stuff to do after exhausting the storylines.
There are basically 3 main storylines in the game
1) Overseer's journey
2) The Treasure of Appalachia (raiders/settlers factions)
3) Brotherhood of Steel
The Overseer's Journey is the original FO76 story, so most of it doesn't have much in the way of NPCs (although they retroactively added some to parts). However, elements of that quest are needed for the other 2 storylines to progress in some instances. They've tied all the questlines together in a way so it makes sense, though.
There are also a bunch of side quests and 2 major ally quests (think the companion questlines from Fallout 4 or FONV). There are also some minor allies but they dont have anything in terms of good questlines.
One tip, though: While you can technically move your camp, there are sometimes issues with complex blueprints bugging out and not being able to place them. I would recommend keeping your camp fairly basic until you find a spot you really want to make a more permanent camp that is more complex in terms of build (if you chose to, that is). Here is my current camp.