The Saints Row series never supported modding, but now that it's under new ownership, that is about to change. Developer Volition will release "what is essentially a full [software development kit]" for the most recent game, and says this year's sequel is likely to get one, too.
The upshot to all this is the PC version of the game can now get new vehicles, clothing, characters and missions. Given just how flat-out bizarre the Saints Row universe is, this could make all of those Iron Man, Skyrim and Star Wars mods in Grand Theft Auto look tame by comparison. Remember, the next game will feature something called The Dubstep Gun. And that's an official weapon.