Well, we're certainly at the point where we know exactly what to expect from Microsoft's monthly Games with Gold promotion. If you're new to the process, it typically features two games that are generally considered to be good, but a bit too old. That doesn't really change in March.
This month's offerings are Sid Meier's Civilization Revolution and Dungeon Defenders -- two games worth checking out if you hadn't gotten to them before. As is the case with these things, Civilization Revolution is free for Gold subscribers through March 16, at which point Dungeon Defenders takes over and is free for the remainder of the month.