Easy "Merchanticide" achieveme...
	Extra gold...
	Mushroom bonus...
	Various Steam Achievements...

The shopkeeper normally cannot be damaged. Find a red dragon in Zone Two, and bring it to the shopkeeper. This will make the shopkeeper afraid of you. After the shopkeeper backs into a corner, either manipulate the red dragon to kill him, or explode some bombs around him to get the "Merchanticide" achievement. Note: This will kill the shopkeeper on all floors and occasionally cause its ghost to haunt you.

At the shop and need a little more gold to buy that awesome item? Simple! Place a bomb (you should start each round with one) in the corner of the shop. The walls drop gold when they explode giving you a little boost to your funds.

In zone Two the mushrooms/toadstools on the ground contribute to your beat multiplayer. Simple walk into one to destroy it.

Achievement	How to unlock
A Beatless Beatdown	Complete Hardcore Mode with Bard.
Bat Trick	Kill three green bats.
Carpe Diem	Complete a Daily Challenge.
Flawless Victory!	Aria Low%. Complete Hardcore Mode with Aria without picking up any items or using any shrines.
Heartthrob	Have 10 heart containers at the same time.
I love gooooooold!	Have 6000 coins in a single run.
In The Zone	Complete zone 1.
In The Zone (2)	Complete zone 2.
In The Zone (3)	Complete zone 3.
Merchanticide	Kill the shopkeeper.
So Hardcore!	Complete Hardcore Mode with Cadence.
Speed Demon	Complete Hardcore Mode with Cadence in under 8 minutes.
Tachycardia	Complete Hardcore Mode with Bolt.
Two Can Tango!	Complete Hardcore Mode while playing Co-op.
Vow down!	Complete Hardcore Mode with Monk.
You Don't Miss a Beat, Do You?	Complete Hardcore Mode with Aria.