Gunslingers each have 3 hearts (shells)
They are dealt 5 cards from the main deck.
Each Gunslinger looks at their hand for an Attack or Item card.
(Any card can be played face down as a "Shoot" card)
The Gunslinger holds their chosen card up, at eye level, facing themself so as not to let other Gunslingers know what they will be playing. All Gunslingers must have Steely Eyed Glares on their faces.
When the Dealer (a chosen Gunslinger or non player) says "GO!!!" all Gunslingers throw their cards at their targeted Gunslinger. Attack cards are thrown at opposing Gunslingers. Item cards are thrown in front of the Gunslinger throwing the card.
If a Gunslinger is attacked they may play Defense cards on top of the attack cards. A Gunslinger may play as many Defense cards as they like in response to an attack.
Gunslingers may play Special cards, if the requirements are met.
Gunslingers lose hearts for any damage that is not negated.
All damage is dealt at the same time.
Gunslingers with hearts remaining at the end of the round are dealt 2 cards. Continue rounds like this until 1 or No Gunslingers remain.
Things to know:
There is no maximum hand size. You can have as many as you are dealt.
The deck is never reshuffled. If you run out of cards, you run out of bullets.
You can't Bleed a Barrel.
If there are Gunslingers alive and no one has cards in their hand, the Gunslinger with the "Knife" card equipped wins (Because they brought a knife to a gunfight).
Fastest game is 13 seconds.
—description from the publisher