Most casual fans like Civ 5 better, and most die hard strategy nerds who’ve poured thousands of hours into playing on the hardest difficulty like Civ 4 better, but both tend to think Civ 6 is pretty good.

If you’ve never played a Civ game before, it’s a cool experience, and probably worth the money. It’s fun to plod around through history saying “hey I recognize that!” and laughing about who built the Great Pyramid this time. There’s a ton of little things to do, and steady drips of rewards and small novelties, so it takes at least a few games to get old. There is a deeper level of strategy buried in there (particularly in 4), but all of them have an awful lot of busywork between major decisions, and I think they’re at their best as a fun tour through history in a blender, rather than as a deep strategy experience.

Of course, you could get the first two Master Of Orion games on GOG for the same price.