(Almost posted it on Off-Topic, but I think its fits here better, its no 4x (at least in the classical sense, there are still eXploring, eXpanding, eXploiting and eXterminating (but for now with a heavy emphasis on exterminition) but at least it is in space and brought me here a few years ago)
Infinity is a game in development since 2005 aiming to become a twitch-based space MMOG set in an realistic sized, procedural galaxy with billions of solar systems for the players to explore and exploit.
At the moment they want to make a smaller, only one system containing arena first to raise funds and build a team for the MMOG
https://forums.inovaestudios.com/latestTheir latest videoEdit: Checked the old Developer Journal, its in Developement since 2005 not 2006