Giftmas with the Grimms

It is Giftmas and you, along with the rest of the Grimm family, are engaging in the tradition of sharing presents, wonderful things like cakes, puppies and electrodes. Will you get what you want, or what you deserve? In this 18-card game, players each have a character card and two or three gift cards (depending on player count) face down on the table in front of them. When it is your turn you may either swap one of your face-down cards with one elsewhere on the table, or turn a card face-up, possibly activating a special action on the gift cards. The round ends when more than half of the players have revealed their cards or when a bomb is revealed, at which point everyone scores points if they have collected the gifts wanted by their characters. The twist comes from the bombs: only one of the character scores highly if she collects bombs, but other characters score nothing for the round if they have one. After an agreed number of rounds, the player with the highest total score is the winner.