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