Hey everyone! Some games are developed with the intent of being online multiplayer experiences from day one. Others reveal themselves as the perfect candidates more gradually. When we began working on Treasure Stack (our first commercial release) 3+ years ago, we intended for it to be a local multiplayer experience similar to games with short, action packed matches like Tetris, Dr. Mario, and Towerfall. Once we realized Treasure Stack was well-suited for quick, ultra competitive online matches, we wanted to push the envelope a bit. That’s when the decision was made to implement cross-play, giving us a better chance of...

-- Source: https://news.xbox.com/en-us/2019/02/20/treasure-stack-cross-playable-starting-march-1/