i dont know how to do the nightmares achievement
I actually already answered this a while ago so here’s a repost hope it helps let me know if you need more help :)
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-go to Hawkfeather ( Grey and White she-cat with green eyes in Fireclan) and talk to her
-Go to Fallenclan and find Beestripe (Yellow and Black she-cat with yellow eyes by the Fallenclan camp entrance
-Keep talking to her until she has no new dialogue (she will give you a long backstory)
-Go back to Hawkfeather
-Go in the direction she pointed in and you should see a new white arrow, click on it
-Keep walking right until you see to new cats ( or 1 depending on the time of day)
-Talk to the grey and white she-cat (keep talking to her until she has no new dialogue as she will give you a long backstory)
-Walk left until you re-enter Fireclan
-Find Hawkfeather and talk to her
—————————— images for extra help:
Where to find Hawkfeather
Where to find Beestripe
Where the white arrow is located after you ask Hawkfeather about the barn
The way you have to continue walking after you click the arrow
The grey and white she cat you have to find