Found this. Back in the day I played Rebuild 1 and 2, they were flash games. Now this one is for desktop since flash went away.
A bit repetitive. But they added new features, they tried to make the characters unique, not just numbers, some customization, story elements, and even factions apparently.
Not sure how much I'm gonna play this, but it's good to have, and can just play some minutes when one wants to wind down.