Central Online

Crossover is a cross-platform online gaming network originally developed by Centennialville Studios (now merged with Clever Interactive).

The service allows users with a Clever ID to save their game data, play online multiplayer, communicate with other players, share their content or scores, and earn achievements across multiple platforms and devices on supported games.

An app for the service which allows you to chat with friends, create parties, communicate with voice and text through the app, view achievements you and your friends earned was released for Windows, iOS, and Android on August 15, 2020.