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 HOMELESS CATS
DEFEAT THE PUFF
100% TABATHA WOLFANG
PLAY WITH BEAR KING
YOU ENTERED GALLERY MODE
UNLOCK MARY KATTY
REACH STAR LEVEL 15
DEFEATS CAT TOY
100% KUMA LUMA
PICK THE GUN POWER UP
PICK THE MISSILE POWER UP
UNLOCK NORMAL LADY WHITESTROKE
REACH STAR LEVEL 10
UNLOCK TIFFANY RANCHO
100% SHADOW MOON
DEFEAT PUMPKIN
DESTROY THE X-NIP MINIBOSS
GET THE CATNIP SPECIAL
UNLOCK KUMA LUMA
GET A PERFECT 5 HEARTS SCORE
SKIP ONE OF OUR COMICS STYLED CUTSCENES
DEFEAT THE CATNIP BOSS
100% DOUBLE NEKOS
PICK THE LASER POWER UP
PICK THE RAY POWER UP
UNLOCK SHADOW MOON
TAKE A PICTURE OF A LOST NEKO
DEFEAT NEKO BELL
GET THE FURBALL SPECIAL
100% MIMI-CHAN
YOU DIED IN A DATE
PICK THE SHIELD POWER UP
DESTROY THE MOTHERNIP MINIBOSS
EXPLODE A PIECE OF CLOTH
PLAY WITH FOXXXY
HAVE YOUR FIRST DATE
PRESS START
UNLOCK TABATHA WOLFANG
DEFEAT THE CATRON BOSS
DEFEAT DEADNIP
DEFEAT THE FURBALL
DEFEAT UPGRADED CATRON
DEFEAT THE CUTIE GANG
DEFEAT SENIOR PICKLES
FIND THE ULTIMATE RIVAL
PLAY WITH LEISURE LION
PLAY WITH JOE
REACH STAR LEVEL 20
REACH STAR LEVEL 30
COMPLETE ONE HAND MODE NORIKO
COMPLETE ONE HAND MODE NEKOS
COMPLETE ONE HAND MODE SHADOW
COMPLETE ONE HAND MODE KUMA
COMPLETE ONE HAND MODE TABATHA
100% TIFFANY RANCHO
COMPLETE ONE HAND TIFFANY
100% NORMAL LADY WHITESTROKE
COMPLETE ONE HAND LADY
100% MARY KATTY
COMPLETE ONE HAND MARY
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!