Synergies are the real build system
In Enter the Gungeon, a “build” is less about one gun and more about the synergies you collect. A synergy fires when two specific pieces are held at once, usually an item plus an item, or an item plus a gun. Below are the strongest, most repeatedly cited synergies and the exact combo that triggers each.
| Synergy | Combo | Effect |
|---|---|---|
| Knight Time | Gunknight Greaves + Ballistic Boots | Time briefly stops when you take a hit — a free window to reposition or fire. |
| Keeping the Beat | Metronome + Drum Clip | Metronome stacks damage per kill; Drum Clip doubles the stack (roughly +4% per kill, capped near +250%). |
| Ice Water | Snowballer + Mega Douser | The water stream freezes enemies and grows larger, locking down whole rooms. |
| King Bomber | Lil’ Bomber + Coin Crown (or Gilded Bullets / Crown of Guns) | Bombs turn golden and enemies drop shells when hit. |
| Telefrag | Chest Teleporter + Teleporter Prototype | Teleporting into a combat room kills its enemies outright. |
| Praise the Gun | Gunsoul + Old Knight’s Flask | Bonfires appear at shops and elevators for mid-floor respawns; dodge-roll cooldown drops. |
| Ecstasy of Gold | Old Goldie + Gilded Bullets | The shotgun’s damage spikes sharply as your health falls. |
| Jolly Roger | Skull Splitter + VertebraeK-47 | Links skull shots into chains and freezes enemies. |
| Great Queen Ant | Gungeon Ant + Gilded Bullets | Swaps the oil for exploding ants that clear enemy bullets. |
| Betrayer’s Lies | Betrayer’s Shield + Lies | Infinite ammo, a larger magazine, better accuracy and fire rate behind a dropped shield. |
How to build around them
- Hold both halves. A synergy needs every listed piece. If you replace one half, the bonus disappears — keep the pair until something clearly stronger shows up.
- Watch the second half drop. Many synergies share a common first piece (Gilded Bullets appears in three above). When you grab a known first half, prioritize finding its partner over a generic upgrade.
- Don’t force a weak gun for the name. Some synergies ride a mediocre gun; take the synergy only if the gun fits your dodge rhythm, otherwise keep your comfortable weapon.
These are the community-favourite standouts; the game has many more, and shrines can reroll loot to help you complete a set.