Driving Strikers is an upcoming online and local multiplayer car soccer game for the Dreamcast and PC. It'll be the first indie game to offer full online play and cross play.
The game has real physics, multiple stadiums, multiple teams, a single player "League mode" and single and local multiplayer matches.
There's a demo of the game on the free Dreamcast cover disc that comes with issue 5 of SEGA Powered magazine! You can get that here: https://www.segapowered.com/shop/p/sega ... d-issue-05
The game is currently scheduled for release around November time. You can follow progress on the @drivingstrikers Twitter account

Update!
I've released an online-enabled demo over at Itch.io. Go download and have fun!
https://youtu.be/j6W-WXZIykY