Here is the full list of all 69 DEEP SPACE WAIFU: NEKOMIMI achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
UNLOCK KUMA LUMA
UNLOCK SHADOW MOON
GET A PERFECT 5 HEARTS SCORE
TAKE A PICTURE OF A LOST NEKO
DEFEAT THE CATNIP BOSS
100% DOUBLE NEKOS
PICK THE RAY POWER UP
PLAY WITH LEISURE LION
YOU DIED IN A DATE
PICK THE GUN POWER UP
PICK THE MISSILE POWER UP
DESTROY THE MOTHERNIP MINIBOSS
PICK THE LASER POWER UP
DESTROY THE X-NIP MINIBOSS
PICK THE SHIELD POWER UP
EXPLODE A PIECE OF CLOTH
PLAY WITH BEAR KING
HAVE YOUR FIRST DATE
PRESS START
UNLOCK TABATHA WOLFANG
DEFEAT THE CATRON BOSS
DEFEAT PUMPKIN
DEFEATS CAT TOY
DEFEAT THE PUFF
DEFEAT DEADNIP
DEFEAT THE FURBALL
DEFEAT UPGRADED CATRON
DEFEAT THE CUTIE GANG
DEFEAT SENIOR PICKLES
FIND THE ULTIMATE RIVAL
DEFEAT NEKO BELL
PLAY WITH FOXXXY
PLAY WITH JOE
SKIP ONE OF OUR COMICS STYLED CUTSCENES
YOU ENTERED GALLERY MODE
REACH STAR LEVEL 10
REACH STAR LEVEL 15
REACH STAR LEVEL 20
REACH STAR LEVEL 30
GET THE CATNIP SPECIAL
GET THE FURBALL SPECIAL
100% MIMI-CHAN
COMPLETE ONE HAND MODE NORIKO
COMPLETE ONE HAND MODE NEKOS
100% SHADOW MOON
COMPLETE ONE HAND MODE SHADOW
100% KUMA LUMA
COMPLETE ONE HAND MODE KUMA
100% TABATHA WOLFANG
COMPLETE ONE HAND MODE TABATHA
UNLOCK TIFFANY RANCHO
100% TIFFANY RANCHO
COMPLETE ONE HAND TIFFANY
UNLOCK NORMAL LADY WHITESTROKE
100% NORMAL LADY WHITESTROKE
COMPLETE ONE HAND LADY
UNLOCK MARY KATTY
100% MARY KATTY
COMPLETE ONE HAND MARY
UNLOCK HOMELESS CATS
100% HOMELESS CATS
COMPLETE ONE HAND HOMELESS CATS
UNLOCK JENNY RAZORHEELS
100% JENNY RAZORHEELS
COMPLETE ONE HAND JENNY
UNLOCK THE DIGINEKO
100% DIGINEKO
COMPLETE ONE HAND DIGINEKO
SEE THE CREDITS!