Debate.Quest attempts to create an online discussion space in the form of a trading card game.
Instead of fighting in social media comment sections that get lost in the ether, players get to put their arguments on digital cards, which can be reused and refined as they compete to form better arguments.

The game is still live, you need at least 3 people, or 3 browser tabs, to play. Keep in mind that it is using a free Heroku instance and has a very basic back end, which means other players can reset your session mid game.