I noticed a bit of variation in what is spoliered and what isn't for the new version. Obviously this was simpler in 40d, with only one (or two, if you counted megabeasts) thing- the pits- that was a spoiler, whereas now we have a whole slew of new features. Some people spoiler almost everything, and some people go as far as talking about demons and slade castles without spoilers at all. Though some people argue that spoilers are pointless as they are plastered all over the wiki/ community games and stories, I still think we should in least show common courtesy when talking about this stuff so that new players can inleast choose whether they want to discover stuff on their own or not.
So from the following list (or if you can think of any more, post), what do you think is not a spoiler, a minor spoiler, or a massive spoiler:
1. Caverns (first layer)
2. Raw'ed inhabitants of the caverns (plump helmet men, hungry heads, elk birds, etc.)
3. Stuff in the caverns (trees, exclusively underground plants -I say this because to some people it may be a pleasant surprise)
4. Beast-men tribes
5. Magma Sea
6. Adamantine (just it's existence, not where it's found/what it seals)
7. Slade (same as above)
8. Existence of Hell (not what's in it)
9. Existence of Slade Fortresses (same as above)
10. Upright Adamantine Swords (just their existence, not Hell/ the demon fortresses)
11. Normal megabeasts (the raw'ed ones, like dragons, hydras, etc.)
12. Titans (the aboveground generated ones)
13. Forgotten Beasts (above, but below ground)
14. Old Demons (the ones in 40d that supposedly still sometimes show up)
15. Generated demons
For me:
Not a spoiler: 1 (easy to find within 5 minutes of playing), 2 (same), 3, 5, 6, 7, 11
Minor: 4 (because they're cool and fun to find on your own), 10 (because without knowing what hell/ slade fortresses are it's not a big deal), 12 (they show up before goblin ambushes)
Massive: 8, 9, 13 (though they also show up early, for me they were much more of a surprise, you dont expect danger from below ground as much), 14, 15