So, I have started a game with a friend, he is hosting.
First session, we both unlocked 6 achievements, including "Pound Lab".
It is worth mentioning that he played a bit alone one night.
Then second session, we go to the "Jungle temple", I am the one pulling the switch, but only he gets the achievement...
I am not sure what are the requirements for unlocking as well for the guests.
Thanks for this amazing game, We can't wait to see the rest!
Regards