A new standalone Saints Row IV expansion called Saints Row: Gat Out of Hell turns out to be the PAX Prime announcement teased for today, as Volition reveals they are teaming with High Voltage Software to add more sand to the sandbox game. Word is: "In Gat Out of Hell players take on the role of Johnny Gat as he is sent into hell via a nefarious spirit board incident and left to combat demons, the horrors of the underworld (including prominent historical figures) and, of course, the Devil himself." This is coming to PCs and consoles (this and last generation) on January 27th in North America and January 30th in other territories, and according to Polygon this will feature two-player Johnny Gat and Kinzie co-op support. Here's the announce trailer (NSFW), and here's word:

After the space faring antics of Saints Row IV, many fans asked what we could do next... the answer? Shoot The Devil in the face. Play as either Johnny Gat or Kinzie Kensington as you tear apart Hell in a quest to save the leader of the Saints’ soul. Historical icons, old friends, older enemies, a talking gun, a full length musical number, and a whole lot of other shenanigans all await you in the open world standalone expansion playground that is Saints Row: Gat Out Of Hell.

Gat out of Hell is the standalone expansion to the award-winning and multi-million selling Saints Row IV from Deep Silver and will launch on January 27, 2015 in the Americas and January 30, 2015 in international territories for last gen and new gen console platforms as well as PC.