It's got a hilarious and fun single player campaign where you get to play as all three factions. Obviously, playing as the giant monster and elbow-dropping buildings is the most fun, but the rest are highly enjoyable as well. Vintage Shiny at its best. Available on Steam, I just recently found out.
It wasn't quite as simple as that. From what I remember, the rights to Watchmen were supposed to revert to him after the book went out of print. But DC just kept the book in print forever, denying Moore any say in what was done. Keep in mind this wasn't normally done at the time, it was a pretty underhanded move they pulled, especially after Moore did so much good work for them (Swamp Thing, Green Lantern, the Phantom Stranger, etc.).
Free and fun to play. Minimal ads with a purchase to remove. Just got a huge new update. Inspiration of Vampire Survivors (also a great game!) and many others.
BRB, gotta dig out the old Bonzi Buddy exe.