Set in the same universe as "The Resistance", Coup is a deception game. Everyone has 2 hit points and last man standing wins.
Your hit points are represented as the cards in your hand and each card is a character with different abilities. The assassin can kill, the contessa blocks assassinations, the ambassador can draw cards and switch roles.
Each player takes turn declaring actions. Call them out and possibly call their bluff. If they lied, they lose a card ( and a HP), if they were right you lose a card (and a HP).
Pretty straight forward and lots of fun. It is great for simpler gamers and doesn't have the draining effect that resistance tends to have. Games also go quick, definitely a game to have as a filler between longer games as well.