You must be holding a total of at least 300 coins. Clear all rooms in each chamber and try not to purchase anything at the shop. If you find the Sell Creep, give him guns and items in return for some coins. You might be able to reach the desired total before completing chamber 3, especially if the secret chamber was cleared. Note: This will also unlock the Coin Crown.
Easy "Case Closed" trophy
Complete one of the main characters' past to get a very rare random chance to find a Bullet Kin with a red cape replacing a regular Bullet Kin. They will simply wander around and will not shoot at you or deal contact damage either. If the caped Bullet Kin is the last enemy in the room with you, it will eventually disappear. Allow this to happen five times over any number of playthroughs to unlock the Bullet as a playable character.
Easy "Day Ruiner" trophy
You will eventually unlock a weapon called "The Mailbox" in the Acquisition's Department. Once obtained, notice that it fires letters, with the last "bullet" being a parcel which can have a variety of effects (poison, explosion, and glitter). Fight the Boss and glitter all over it. If done correctly, the Boss will be sparkling. Then, kill it using another weapon.
Easy "I Knew Someone Would Do It" trophy
Flip a table on its side then push it into a pit.
Easy "Lion Leap" trophy
Kill the Boss on the fifth floor, "High Dragun", then pass through a bullet casing curtain and enter an area with floating platforms. You will usually maneuver through this area by dodge rolling and reach the chest that contains the "Gun that can kill the past". Instead, jump off one of the floating platforms. You will not take damage or die and instead simply return to the location where you jumped off.
Easy "Not Just A Box" trophy
Any chest will rarely be a mimic. Shoot the chest once before attempting to open it. If it is a mimic, you will earn "Not Just A Box" and unlock the Book of Chest Anatomy. Note: If playing as the Hunter, your dog will bark at the chest to indicate it is a mimic.
Easy "Rage Mode" trophy
Flip a total of 500 tables.
Easy "Re-Armed" trophy
Speak with the Blacksmith on the fifth floor after delivering all the components of the bullets. She will tell you that she made a replacement arm for the Golem in the Breach. The arm can be found on the floor next to her. Take it then explore the floor until you encounter an enemy with a balloon attached to it. Kill that enemy and it will drop the balloon. Pick it up. The arm will be lifted up by the balloon and can now be found on the previous floor. You can complete the run with either outcome. On your next run where you reach the fourth floor, you will find the arm and the balloon after defeating different enemies. This will send the arm to the third floor. Repeat the process, by killing enemies until both the arm and balloon drop until you pick up them up on the first floor. This will deliver the arm to the Breach, where you can pick it up and give it to the Golem. You will receive the "Clone" item as a reward. Thus, this requires at least runs after you have constructed the bullet. If you fail to find both items, or fail to reach the required floor, you can still find the arm and the balloon on the floor you last delivered it to.
Easy "The Password" trophy
Green demon faces will rarely appear in rooms, usually on the later floors. If you have either 100 casings (money) or at least one curse from any source (altars, cursed guns, stealing, breaking a mirror etc.), enter and to teleport to a market room with every item-selling Gungeon NPC available, including a side room with Winchester and his game. If you do not have 100 casings or a curse, the face will spit you out.
Secret Achievements
Complete the following tasks to unlock PlayStation 4 trophy rewards.
Achievement
How to unlock
Beep (Silver)
Unlock the Robot.
Case Closed (Silver)
Unlock the Bullet.
Deadliest Game (Bronze)
Kill the Hunter's Past.
Double Jeopardy (Bronze)
Kill the Convict's Past.
Exorcist (Bronze)
Kill a Jammed Boss.
Grate Hall (Bronze)
Access the Oubliette.
Gun Game (Silver)
Complete the game with the Sorceress's Enchanted Gun.
Gungeon Master (Gold)
Clear the Sixth Chamber.
Historian (Silver)
Complete all 4 main character Pasts.
I Knew Someone Would Do It (Bronze)
Why.
Jammed (Bronze)
You've met with a terrible fate, haven't you.
Lion Leap (Bronze)
Fall at the last second.
Not Just A Box (Bronze)
Get the jump on a Mimic.
Reverence for the Dead (Bronze)
Access the Temple.
Squad Captain (Bronze)
Kill the Marine's Past.
The Password (Bronze)
Accessed the Hidden Market.
Time Paradox (Bronze)
Die in the Past.
Wingman (Bronze)
Kill the Pilot's Past.
Various Trophies
Complete the following tasks to unlock PlayStation 4 trophy rewards.
Trophy
How to unlock
Beast Master (Bronze)
Complete the game with Beast Mode on.
Biggest Wallet (Bronze)
Carry a large amount of money at once.
Cartographer's Assistant (Bronze)
Map the first Five Chambers for the lost adventurer.
