Bro N Sis, recognized as a card accumulation and shedding game, is played with numbered cards ranging from 2 to 14. It is also referred to as the Shit Head game, which serves as the basis for the system mechanics found in Bro N Sis. This game, titled Bro N Sis: Annoying Person, is a prototype designed for multiplayer engagement with players worldwide. Developed using the Unity Game Engine, it utilizes various services including Authentication, Cloud Save, Relay, Lobby, and more. The initial development phase involves crafting the user interface, mechanics, sprites, and other necessary elements, organized through a flowchart prior to development. The flowchart encompasses login, game initiation, lobby creation, joining a lobby, inviting players, and game commencement. Following this is the mechanics flowchart, which describes how the system distributes cards to all players involved. The automatic system also configures all players’ face-up and face-down cards when giving out cards. The system determines which player begins the game by checking the face-up cards for the lowest number, which is three.

If no player has a three face-up, it then checks their hands, incrementing the number until it identifies the lowest to establish the first player. Each player receives nine cards: three face-down, three face-up, and three in hand. After players have received their cards, both face-up and face-down cards can be viewed. Players have the option to swap their hand cards with the face-up cards before commencing the game. Once the swap cards are selected, they will transition to the current selected swap card. During their turn, players must choose which card to play from their hand before concluding their turn. Players can play up to four cards of the same number onto the pile. Once completed, this pile will eliminate all cards present, permitting the current player to continue playing another card. If there are no cards left in hand, players may then utilize the face-up cards; if no face-up cards remain, they can then play face-down cards. After playing matching cards from the piles, they can select another card available for their next move. In the standard card variation, the two card ranks as the highest number, allowing it to be played against any face-up number in the pile. This provides the current player an avenue to play their card when no alternatives are present. Another powerful card is the number ten; when played into the pile, it destroys all cards within, necessitating the player to shed another card.

Additionally, Bro N Sis presents a variation known as Chelsea Rules, which modifies the effects of the three and seven cards. The three card reverses the turn order; instead of proceeding clockwise, it alters to counterclockwise. However, during the counterclockwise phase, the turn shifts back to clockwise, resulting in a different player than usual making the next move. When a three card is positioned on the pile, it becomes semi-invisible, exposing the card behind it. The next player, who is actively playing, must play against the visible card behind the semi-invisible three. Conversely, players cannot play against the three card within the pile. As for the seven card under Chelsea Rules, when placed on the pile, it will terminate the current player’s turn. The succeeding player must play a card valued lower than seven onto the pile, which can be a seven, six, five, four, three, or two card. These cards can successfully play against the seven card variation. Should players find themselves with no useful cards, they must pick up all cards from the pile and augment their hand with these cards. This results in the player accumulating cards that have been played and not discarded.