Here is the full list of all 11 Project Yo-Yo Playtest achievements.
You've just charged up a paused YoYo with a damage modifier based on how many times it hits enemies on the fly!
You've just recalled a YoYo that unleashes more damage based on its damage modifier! You're a Natural!
You’ve reached 100 Kills in total!
You’ve just gained your very first powerUp!
You've reached 100 Kill Streak! Monster...!
You've dealt up to a record-breaking 300 damage on one hit!
You've created a deadly array of 50 Ultimate YoYos! Insane!
You've gained 30 powerUps in total!
Your walking speed has been upgraded 15 times!
You've just push-killed an enemy! Brutal!
You've recalled up to 50 YoYos at a time!