Yeah, this was announced a number of years ago, a fan made game which they're letting use the IP so long as it's released for free. Unfortunately I seem to remember them saying it was just going to be the multiplayer, which is a shame, but I'll certainly check it out when it's finished, but given that it's a fan made hobby project that could be a while.

Don't ruin the moment

Currently Playing: Rocket League (PC/PS4), Dead Cells (PC)

LordyPlays on YouTube