Here is the full list of all 52 GRAY achievements.
Appear in the game world for the first time
Die, at least once.
Complete the first phase of puzzle chambers.
Appear in the bar for the first time.
Look through the window in the bar.
Look at Lisa's... for the first time.
Take a peek in the hole.
Complete the first charging room.
Buy the Lujito cheaper.
Offer a drink to Laurel.
"Shoot" in the Lili's face, but only in the extra scene.
Complete the charging room.
Click on "contraceptives" in the LLLushop.
Get the "blue thing" from the LLLushop.
Meet the nurse for the first time.
Use your X-RAY on the nurse.
The first "close" contact with the nurse. Animated contact...
Follow the flying bot and take a blue sphere.
Complete the cleaning minigame.
Meet Leopoldo for the first time.
Complete the first minigame on a date.
Complete all minigames on a date without losing any heart.
Unlock the door with the code.
Use your plasmo to open the hole in the wall again.
Convince Lutsy to give you something.
Complete the minigame in the engine room.
Complete the spaceship minigame.
Defeat the enemy's mothership.
Get the reward from Liu :)
Finish the first part of the game.
Pay Lutsy again and get the final reward.
Beat Loseph.
Win the dark bot.
Put the "blue thing" in the dark part of you.
Reveal the truth.
Finish the game!
Gain three Plasmo in the puzzle chamber.
Complete all puzzle chambers with 3 Plasmo.
Find 9 blue spheres in the game.
Unlock all achievements.