Here is the full list of all 29 HeartZ: Co-Hope Puzzles achievements.
Play and finish an act with a friend
Win your first challenge
Play and finish an act with two friends
We can't find an excuse to give you three medals!
Use the Protopulse for the first time
Restart a room
Play and finish an act on your own
Collect all the statues in an act
First use of a switch. An achievement that only has nostalgia value.
Very good question...
Finish an act, collect all the statues, and complete all its challenges
Finish an insane number of rooms
First time the Protopulse is attracted by a Tesla
Save Vince-var-A from his cell
Follow Vince-var-A until Nylus shows up
Finish the adventure
Had you going, huh? Right to the end.
Take control of a Vbot
Rach Vince-var-A's jungle lab
Get all of the parts for Vince-var-A's machine
Finish the adventure. For real.
Collect all the statues, complete all the challenges, and finish all the acts on your own, with one friend, and with two friends
Collect all the statues
Win all the challenges
Bark loudly to wake up any sleeping Vbots
Kill a friend by farting
Kill one of those big fat Vbots. They deserve it.
Defeat Nylus without giving him enough time to charge a single Protopulse
Be gently mocked by the achievements system