(Aug 3, 2016 Update: Coterie is now playable on mobile or touch devices as well. Play Coterie)
Growing up I deeply enjoyed two specific cards games: Triple Triad in Final Fantasy VIII and Tetra Master in Final Fantasy IX. Having some extra time this past week I developed a simple card game variant called Coterie. What started as an excuse to get more familiar with flexbox in css ended up actually being fun to play!
This two player game starts with each player having a different colored set of 8 cards. Each card will have random points distributed around its corners and sides - these points may range from 0-2. The players take turns setting a single card on an open slot on the 4x4 board. If the card they set down has an adjacent card of the opposite player near it (called peers), we compare the numbers on that matching corner and side. If the active players matching corner or side number is less than the opponents than nothing happens, if it is greater than the opponents than the opponents card changes color to the active players (called conversion). Finally, if the opponents matching number is the same as the active players than a coterie happens. When a Coterie happens, the active player takes the opponents peer, and then any peers connected to the taken card that has a lower touching number or matching number, which would cause another coterie. After a Coterie occurs, the card has all points reduced by one. Coteries have a tendency to cascade so special attention should be made to keep this in mind.