When going to the games list on my steam profile, and selecting to sort by playtime, http://steamcommunity.com/my/games/?tab=all&sort=playtime I get a list that looks like this.
As you can see 5 games are highlighted and placed at the top of the list for some reason. Why are those games highlighted and moved up top?
It's not recently played games, because I haven't played WFTO in a couple months, and haven't yet played Pillars of Eternity at all.
Best Answer
As Jersh stated in comments, that indicates a game that has been recently downloaded or updated.