There was a space MOBA for a while, but they went pay to win after a while.
Now, it’s official no longer running, but some players have set up a few servers, and have unlocked everything.
Fractured Space
Great idea, until they went Pay to Win with the ability to buy crew. Before that, you needed to grind or pay to unlock ships, but they were mostly balanced.
You could even play as a Carrier, launching bombers. Or a stealth ship, or basically a giant Turret.