Here is the full list of all 50 Granblue Fantasy: Versus achievements.
Clear Arcade mode
Clear the RPG mode tutorial
Activate skills 100 times using technical commands
Complete all achievements
Clear main quest chapter 1 of RPG mode
Clear main quest chapter 2 of RPG mode
Clear main quest chapter 3 of RPG mode
Clear main quest chapter 4 of RPG mode
Clear main quest chapter 5 of RPG mode
Clear the final chapter of the main quest
Unlock main quest chapter ∅ of RPG mode
Get a Vyrn weapon in RPG mode
Get a Luminiera Blade Omega in RPG mode
Discover the Tower of Babyl in RPG mode
Use Request Backup (Online) in RPG mode to join a co-op quest and clear it
Use search filters in RPG mode to join a co-op quest and clear it
Clear an RPG mode quest with a player 2-controlled partner
Defeat 50 slimes
Perform 30 draws
Beat the CPU on Normal or higher difficulty in Versus mode
Use the key record feature in Free Training mode
Complete the tutorial matches
Win an online match
Save a replay of your match
Use a sticker, emote, or phrase online
Clear all basic missions in Mission Training mode
Clear a character's skill practices in Mission Training mode
Clear 10 combo practices in Mission Training mode
Clear a character's countermeasures in Mission Training mode
Watch an RPG mode cutscene in Gallery mode
Unlock all entries in the glossary's Characters and Terms section
Edit and save your profile or avatar
Activate skybound art 100 times
Activate super skybound art 50 times
Finish off an opponent with a super skybound art 10 times in a match
Dodge attacks or cross over an opponent 100 times
Hit an opponent with overhead attacks 100 times
Throw an opponent 100 times
Summon Proto Bahamut 10 times in a match
Summon Ares 10 times in a match
Use the skill With Sweetest Skills! on an opponent 10 times in a match
Freeze an opponent in ice 10 times in a match
Petrify an opponent 10 times in a match
Finish off an opponent with a 3-count pinfall 10 times in a match
Step on an opponent 10 times in a match
Summon Yggdrasil 10 times in a match
Attack with Momo 10 times in a match
Unleash the Spear of Arvess 10 times in a match
Unleash the Great Scythe Grynoth 10 times in a match
Spend a total of 100,000 rupies