Oh, yes. Endless Space will be enjoying a free weekend over the next couple of days, and undoubtedly at a greatly reduced price. It has come a long way since release, including a lot in the way of adding personality and ambiance that many felt was missing from the game. New factions added, discovery events etc. etc., huge overhauls. Highly recommend Squaddies with an eye for such a thing check it out over the weekend, given the cost of entry is a few gig and an hour or two to see if it floats boats.
PC and Mac. Good to go. One of my absolute favourites of the year.