Enter the Gungeon — Achievement Walkthrough

Some chests are Mimics — disguised monsters. They have subtle tells: slightly off colour, a faint tongue/teeth outline, or they're placed oddly. When you suspect a chest is a Mimic, shoot it before interacting — if it was a Mimic, your shot 'pre-fires' on it and this unlocks. If it's a real chest, shooting wastes nothing. Get in the habit of shooting suspicious chests; you'll catch a Mimic soon enough.

Glitter comes from specific items/guns (e.g., the gun 'Gunther' applies glitter, or items that 'gild' enemies). Apply the glitter effect to a boss, then land the killing blow while the glitter status is active. The simplest path is finding Gunther or a glitter-applying synergy, hitting the boss to coat it, then finishing it before the effect wears off.

Knockback effects (many guns, and especially the Blank's shockwave or knockback items) push enemies. Near pits/chasms, blast enemies into the gap. Blanks are great for this — pop a Blank with enemies lined up at a pit edge. Cumulative; rooms with pits + flying/light enemies make it easy to rack up.

This is a multi-step quest spread across the Gungeon. You must: (1) free the NPCs and progress their questlines, (2) collect the three special items — the Prime Primer, the Obsidian Shell Casing, and the Gun Piece — by completing the relevant NPC tasks (Daisuke/Tonic, the Blacksmith, and reaching the Forge on floor 5), then (3) reforge a gun at the Blacksmith on the Forge (Chamber 5). The 'Gun Piece' drops from beating the Dragun; bring it to the Blacksmith. Reforging produces the Bullet That Can Kill the Past, which you then use to clear a character's Past. It's the backbone of the platinum — work the NPC quests across runs.

Each character has a Past — a special boss fight reached by carrying the Bullet That Can Kill the Past to their secret Past portal (it appears once you have the bullet). You must beat the Past for all four starting characters. The bullet is consumed per attempt, so you re-build/obtain it each time (after the first reforge, killing the Dragun with the bullet's prerequisites lets you keep doing it). Do them one character at a time: reach floor 5+ with the bullet, take the character's Past portal, and beat their unique boss. Each Past is a tailored encounter — learn its phases.

Bosses become Jammed when your Curse stat is high enough (Curse 5+ has a chance; Curse 10 guarantees a Jammed boss and the appearance of the Lord of the Jammed). Build Curse intentionally: pick up cursed items (the skull icon), open the red-chest 'Jammed' items, and avoid removing curse. Then beat the now-Jammed boss — it's faster and hits harder, with extra red bullets, so come prepared with armor and good DPS. Easiest on an early floor where the boss is simpler.

You need a freeze source — an ice/frost gun (e.g., Frost Bolts, the Freeze Ray) or an item that freezes enemies. Freeze an enemy solid, then dodge-roll into the frozen statue to shatter it. Any low-tier frozen enemy works. If you don't have a freeze weapon, the Elder Blank or certain synergies can freeze; otherwise wait for an ice gun to drop and shatter a frozen mook with a roll.

The Black Market is hidden behind a secret door that you unlock with the 'Old Crest' item / by giving Bello a specific item, OR by finding the entrance after meeting the right conditions. The reliable route: acquire the Ration/Old Crest questline item and use it on the locked door on the relevant floor (the entrance is a cracked/secret wall — blank near suspicious walls to reveal secret rooms). Once you have access it persists. Use Blanks next to dead-end walls to find secret-room prompts; the Black Market entrance is one such hidden door.

Curse builds from cursed items/guns (skull symbol), taking certain shrines, and time-related effects. Stack as many cursed pickups as you can find and avoid anything that lowers Curse. At Curse 10 the Lord of the Jammed can appear to try to kill you — so be ready to either fight or flee. Hitting 10 is the goal; a run where you greedily grab every cursed item gets you there. Note high curse makes everything harder, so do this deliberately on a strong run.

A Master Round drops from a floor's boss only if you beat that boss WITHOUT taking any damage on the entire floor (including the boss). You need this on five floors in one run. Strategy: play a tanky, high-DPS character (the Marine for accuracy, or whoever you're best with), prioritise dodge-rolling through bullet patterns over shooting, buy/keep armor and Blanks for emergencies, and learn each boss's patterns cold so you can no-hit them. Curse control matters — high curse spawns the Jammed (harder) enemies. Take it floor by floor; if you take a hit, you've lost that floor's Master Round but can still get the others. Five clean floors in one run is the ultimate skill check.

Beast Mode is one of the special run modifiers unlocked from the NPC challenges (Daisuke/Tonic's challenge tonics in the Breach). Enable it before a run, then clear to the Dragun and win. The modifier changes enemy behaviour, so play a character you're comfortable with and treat it like a normal winning run under the modifier's twist. Unlock the mode first by completing the prerequisite NPC challenge.

Advanced bosses are tougher versions with extra attack phases (the Advanced Dragun is the main one, fought via the normal floor-5 boss under the right conditions). Reach the Dragun with strong DPS and survivability, and survive its extended, harder pattern set. Bring armor, a powerful gun, and Blanks for the dense bullet phases. It's a straight skill/gear check — beat the advanced version once.

Many rooms have hanging chandeliers. Shoot the chain/chandelier when enemies are underneath to crush them. Make it a habit: when you enter a room with a chandelier, position enemies under it and drop it. Cumulative across all runs, so over time you'll hit 100 just by using them whenever they appear.

You can steal from Bello's shop, but he'll turn hostile and shoot you for the rest of the run if you do (and prices rise/he leaves). To steal safely you ideally have a stealth item (e.g., the 'Clone', or items that let you grab and dodge out). Otherwise, grab an item and immediately roll out of the shop, accepting Bello's wrath. Do it once or twice per run; 10 total is cumulative. The Ration/▲ items or stealing near the exit reduce risk.

The Mines (Chamber 3) have mine cart rails. Hop in a cart and shoot enemies while riding. Each Mines visit lets you tally a chunk. Cumulative across runs, so keep using the carts every time you're on floor 3 and you'll reach 100.