Here is the full list of all 11 Sonder achievements.
Complete the Story mode.
Break all the chairs in level 1.
Super sonic speed! Complete the game in under 15 minutes.
What’s this? A secret room?
The fear of being percieved - kill 50 Everlooking Eyes.
Survive 10 minutes in Survival mode.
Skip all the cutscenes. Not our fault if you didn’t understand the story.
Accidentally (or intentionally) kill each other 10 times in the same level.
Explode 7 grenades with Robots pulse.
Boost Robot 12 times with Souls dash.
Football? In our Sonder? Yes - and you won!