Since the game is RGN. I'll just give some tips:

• You can abuse of the "Retire" feature.
  

  There is a method to unlock many Bullets and Cartridges from the beginning:
  
  Start a Mission > Options > Retire.
  
  You will unlock Bullets or Cartridges. Do it until you no longer get any reward.

  https://sp.zhabite.com/sharedfiles/filedetails/?id=2850111611
  
• You can abuse of the autosave, in many ways:
  - If you about to die, just alt+f4. Start the game. You wil back to the map.
  - If you are opening a Treasure Box, but you dont like the reward, just alt+f4. Start the game. You will back to the map.
  - If an Event outcome doesn't like you, just alt+f4.Start the game. You will back to the map.
  

  While in a Shop, if you alt+f4 after using Scout Ticket, you will keep the Scout Ticket, but once you start the game again, you will appear in the map after the Shop.

• Your initial deck sucks. Try to open as many Treasure Boxes as you can. Also try to Swap Cartridges to get Stronger Cartridges.
  

  If you did the "Easy Farm Method", you will have 5 of the Strongest Cartridges in the game:

  • Haughty Red Dragon (Passive. It will make All Bullets gain +1 Attack Power for each Bullet used before.
  • Joltcircle (Passive. It will Paralize one enemy at the start of the combat.
  • Red Anniversary (Passive. All Bullets will have +2 Attack Power.
  • Blue Anniversary (Passive. Gain 20 Shield at the start of the combat.
  • Yellow Anniversary (Passive. It will Increase +7 delay All enemies at the start of the combat.

  
  Also, you get some of the Strongest Monochrome Tactics Bullets:
  

  • King Duchtoli (Costume)
  • Merlette (Costume)
  • Queen Veresov (New Years)
  • King Duchtoli (Academy)
  • Haru (Black Knight)

  The deck I used to clear Bullet Break Mission for first time:
  https://sp.zhabite.com/sharedfiles/filedetails/?id=2850451591

• You should avoid as much encounter you can, at beginning, until you unlock more Bullets and Cartridges. For now, Treasure Boxes and Scout Tickets should be your only source of Bullets.
  
  You need to unlock more Bullets since most of Cartridges Effects consist into increase certain Bullets Traits.
  
• While in Shop, if you have enough Giga, you will notice that buying items will reduce the cost of the Featured Bullet. You can reduce the price to 0 by buying 5 items (6 if its a Singulalady).
  

Clear Monochrome Tactics.

You need to clear 3 floors. Each floor has a Boss at the end of it.



Clear Seasons of Love.

You need to clear 3 floors. Each floor has a Boss at the end of it.



Clear The Aquarhythm Deep.

You need to clear 3 floors. Each floor has a Boss at the end of it.



Clear Phoenix Gunner.

You need to clear 3 floors. Each floor has a Boss at the end of it.



Complete Super Bullet Break.

You need to clear 1 floor only. There are 4 random Bosses and 1 Final Boss.



Clear Princess Stage!

You need to clear 5 floors. Each floor has a Boss at the end of it.



Clear Beastly Brawlers.

You need to clear 5 floors. Each floor has a Boss at the end of it.

Fill the Bullet section of the encyclopedia.

See the my Bullet Collection guide for a detailed list of Bullets with Traits.
https://sp.zhabite.com/sharedfiles/filedetails/?id=2852686979

You unlock Bullets by completing or failing Missions (only at beginning. See the method below. There is a limited quantity of Bullets you can get this way); certain Events; Treasure Boxes; Scout Tickets; Encounters (defeat enemies). Some are fixed, but you can get most of them from the Treasure Box, Encounters and Scout Tickets.

Scout Ticket has Limited Quantity of Bullets available at beginning.

For example, you can't unlock a Singulalady, if you haven't finished Bullet Breaker Mission.

There is a method to unlock many Bullets and Cartridges from the beginning:

Start a Mission > Options > Retire.

You will unlock Bullets or Cartridges. Do it until you no longer get any reward.

https://sp.zhabite.com/sharedfiles/filedetails/?id=2850111611



Once you finish all Missions you will unlock Nayuta as Playable Character. Her ability is than you can use all Bullets and Cartridges without restriction.

In the main Menu you can select "Playable Character" with LT / RT.



Fill the Cartridge section of the encyclopedia.

See the my Cartridge Collection guide for a detailed list of Cartridges.
https://sp.zhabite.com/sharedfiles/filedetails/?id=2853306948

You unlock Cartridges when completing or failing Missions (only at beginning. See the method below. There is a limited quantity you can get this way); you can exchange the Bullet's Cartridge in the Rest Spot (Swap Cartridge).

Looks like Cartridge Swapping at the Rest Spots is the only way to fill Encyclopedia. Getting Cartridges in other way wont count for Encyclopedia (maybe its a bug). Keep that in mind while farming for Cartridges give Rest Points priority. This achievement will be your last.

There is a method to unlock many Bullets and Cartridges from the beginning:

Start a Mission > Options > Retire.

You will unlock Bullets or Cartridges. Do it until you no longer get any reward.

https://sp.zhabite.com/sharedfiles/filedetails/?id=2850111611



Once you finish all Missions you will unlock Nayuta as Playable Character. Her ability is than you can use all Bullets and Cartridges without restriction.

In the main Menu you can select Playable Character with LT / RT.

Acquire all Singulaladies.

After clearing Bullet Break Mission you will get notice you have unlocked All Singulaladies, but you need to unlock them all again in Encounters / Treasure Box / Scout Ticket, you will get a second unlocked notice. Once you have unlocked them all again, you will get the achievement.

There are 5 Singulaladies:



Scout 30 times.

Its cumulative. You need to spend 30 Scout Tickets in the Shop.

You can buy Scout Tickets in the Shop (1 per visit). Some events rewards you with Scout Tickets.

Clear a mission with a Buggo bullet.


The easiest Mission is Monochrome Tactics, you need to defeat the 3 Bosses in order to complete the Mission. You can get Buggo Bullet from Scout Tickets. It has a chance to appear with the trait Bullet Break.

It has to be in your deck when finishing the Mission. You will get the achievement right after you defeat the third Boss.