Achievements such as "Slice of life" and "Chestmaster 2000" require that you interact with a certain number of interactive objects. These objects appear to all players in co-op, and seem to benefit all players when any one player interacts with them. So - when another player in my party interact with one of these objects, does it count towards my achievements?
1Slice of Life
Use 50 Health wells
Chestmaster 2000
Open 2000 chests
1 Answer
Both Health Wells and chests only count for the person that opened them.
I just joined a multiplayer game to test this out. I started at 37 chests and 5 health wells, and my friend had 78 chests and 10 health wells. He opened a chest and, after a delay of 3 or 4 minutes, his updated to 79, while mine stayed at 37. The next chest I opened, and after a delay mine incremented and his did not. We found a pair of health wells, and noticed the same behavior. After a few minute delay, the person who interacted with the object got credit while the other person did not.
1