I have only played the original game, not the sequel (B&W 2), but the game is a lot of fun! I reccomend it highly!
the premise is thay you are a pagan god trying to establish yourself in a world called eden (though it isnt Eden. the game uses a few religious terms but the use is sort of non-sensical since the use isnt what the words really mean… at all) and there are other gods and some want to be the only god. to defend yourself against the hostile gods you need to slowly aquire “creeds” that boost your power, culminating in the ability to totally erase another god from existance.
You can be good or evil. and you have a giant pet (anything from a sheep or monkey to a polar bear or turtle) that you can train to do your bissing or help take care of your worshippers or convert other towns to yoru side. the animal has a mind of its own though and so if you dont teach and dicipline it it can be a handful to control.
as for caveats:
there is a bit of violence. it is non graphic but:
Your pet and other gods’ pets can fight and they relfect the wounds they recieve. no blood, but some nasty bruises.
The villagers can be killed in a whole number of ways liek bing lit on fire, crushed, drowned, eaten by your pet (which you should punish him for), burned, die from sickeness, die from age, and even sacrificed (you are pretty much evil if you do this though and it is not graphic at all. you can also sacrifice plants and animals) none of the violence is graphic though, a dead villagers just keels over.
You can punish or reward your pet with strokes or slaps, and if you get carries away, youy can beat the animal within an inch of its life (but thsi will seriously harm your relationshipwith him, and besides is a pretty sick thing to do)