"Monolith: Antares Edition".
If there is a version 3, then Monolith: Borealis Edition etc. All just for fun.
It would certainly differentiate the game from the tons of products / companies out there also called Monolith.
Another option would be switch it around i.e. "Antares: the Monolith". Which would also lean into a setting / adventure / campaign in i.e. the Antares system. I'm always amazed with The Expanse, with so many adventures and plots going on in a single star system before the ring deployed itself.