So question to anyone who's playing this in co-op or on a server - Are achievements such as defeating a boss, or reading a a rune that reveals a location, specific to the map or the player?
If two players are playing co-op on a map, do BOTH players have to summon and unlock Eikthyr, and present mount the trophy to gain the Eikthyr power etc?
Or can just one player on the map grant it to all other players?
If I've read the rune which which gives the position the second boss on a map I'm plain solo, and then join someone else's map (in co-op), I assume I have to read that same rune again on their map? Or would I instantly see the location of the second boss on their map (& any map) I join?