It has been a while since we checked in on Warframe, the space ninja-themed free to play MMO from Digital Extremes. Well, a quick glance shows that not only is Warframe still going strong, but the developer has a new game called Soulframe in development as well. Many of us have played Warframe at some point over the years, but far fewer gamers have tried Dark Sector, the single-player action game that takes place earlier in the Warframe timeline. Well, Dark Sector is free on Steam from November 27-30, so now's a great time to grab it up.