Codenames is a realtime multiplayer web-app version of the board game of the same name. Two teams of two play against each other, using word-associations to collect their cards. The first team to get all their cards first wins. Using Firebase and React-Redux, we ensure the security of card information, to prevent cheater from accessing the answers. We also created a change-log structure in Firebase, increase the scalability of our app, and make it AI capable.