I've never played either of those games, can you describe some of the mechanics? For decks, so long as you are doing anything particularly complicated (reordering cards, building a deck from multiple different decks, have the back of the cards contain information that is important to the choices of the person drawing), most things are possible. Most classic board games are completely possible on Roll20 without special consideration. Games like Risk, Monopoly, Settlers of Catan, Axis and Allies, are all possible without much difficulty. Even more esoteric games like Wishes for Fishes or For Sale could be done. Games like Backgammon, Othello, Chess, Go are also possible.
