Here is the full list of all 51 Unit 4 achievements.
The base game contains 44 achievements, and there is 1 DLC pack containing 7 achievements.
Answer to Boss in a composed way
Answer to Boss in an excited way
Answer to Boss in a bored way
Answer to Boss by asking for more info
Complete the VR tutorial
Defeat Tedious
Defeat Rose
Defeat Ki
Defeat Starboy
Defeat Grim
Defeat Void
Disrupt the invasion and save the galaxy
Unlock the second memento planet
Unlock the first memento planet
Unlock the third memento planet
Bought a ship customization from Pablo
Make 20 purchases at Gamutu's shop
Make 48 purchases at Pablo's shop
Explore the entire galaxy
Open the Encyclopedia Galactica
Find all the secrets
Complete DOOMO with a completion rate of 100%
Complete 1C1-FYR3 with a completion rate of 100%
Obtain an overall completion rate of 100%
Defeat 50 enemies
Defeat 100 enemies
Defeat 200 enemies
Defeat Rose without dying
Defeat Starboy without dying
Defeat Void without dying
Glide for a total of 5 minutes while in Yellow's Ghost mode
Dash 100 times with Red
Kill 50 enemies with the hook
Perform 150 double jumps with Blue
Complete a submarine race
Complete a scooter race
Complete an astroship race
Complete a submarine race with more than 20 seconds remaining
Complete a scooter race with more than 20 seconds remaining
Complete an astroship race with more than 20 seconds remaining
Complete each racing minigame
Complete each racing minigame with more than 20 seconds remaining
Buy a character skin from Gamutu
Complete D00M-ST4R with a completion rate of 100%
Clash of Agents: Complete a game of Bouncing Madness
Clash of Agents: Collect 80 coins during Bouncing Madness
Clash of Agents: Complete a game of The Great Climb
Clash of Agents: Reach 8.0 meters in The Great Climb
Clash of Agents: Complete a game of Space Brawl
Clash of Agents: Defeat 40 enemies in Space Brawl
Clash of Agents: Complete each competitive minigame