Though written without regard for alternative voting methods, maybe the National Popular Vote Interstate Compact is still OK.
Concurrence is a card-based coopetitive voting game. Suits represent issues, and ranks represent positions on those issues.
There are three kinds of voting methods— allocative, comparative, and evaluative—based on the expression form and constraint. Allocative methods give each voter a fixed amount of “vote” (continuously divisible or as discrete tokens) to allocate among candidates. Comparative methods allow voters only to show preference between pairs of candidates; generally, this is done by ranking them. Evaluative methods have voters rate candidates independently on a scale (numeric or graded). There are also hybrids, e.g. multi-stage voting methods that combine voting methods of different categories.