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