On this floor you will find a sell creep in its own room.
Enter the gungeon is there a secret room every floor.
Entrances to secret rooms can be opened with blanks most things that trigger blank effects such as armor and certain explosives including the bomb lil bomber and the explosion of a fused chest.
In some rare cases the second barrel might be in the hidden room rendering it impossible to enter it when the first water barrel is destroyed.
Give master bullet and two items to sell creep in hollow start a run and make your way through the levels until you reach floor 4.
Bosses are strong enemies found at the end of every floor in the gungeon defeating a boss allows the player to advance to the next main floor.
There is typically one secret room in each chamber though it is possible for a chamber to have no secret room or multiple secret rooms.
Upon being killed bosses drop a weapon or item of random quality several hegemony credits and one to three pickups such as hearts ammo or keys bosses will always drop a gun if the player has not yet picked up a gun on the current floor.
Interacting with the inside of the fireplace will unlock a hidden room somewhere on the floor.
Floor 1 and 2 both have rooms you can unlock by doing a special something.