Masks for your character were all the rage in this game back in the day. There were two Masks and one Gun that were unlocked by playing and completing the demo of the game. See this tweet from 2013 for a picture of the items in question. (EA disabled the online functionality of the demo long ago so these items are no longer obtainable via legitimate means.) The important thing to note here is that these items were already on the disc; it’s just that they would only show up in your game by finishing the demo using the same XBL profile. I really want these items.
I checked both Xbox 360 Tools and Horizon. The first two Army of Two titles are on Xbox 360 Tools, while none are on Horizon. With Xbox 360 Tools, you can only mod your cash balance for the first two games. I believe there should be a way to add Masks and/or Guns to your save file as well.
A perfect analogy here is Forza Motorsport 4. The Unicorn cars in that game were already present on the disc, you just needed to be ‘gifted’ them by the developer (Turn 10) for them to show up in your game. Using Horizon, you can add all of these Unicorn cars to your save file. I don’t see why we couldn’t do the same thing for Devil’s Cartel. The only reason FM4 is on Horizon and not this game is because the former is more popular, but it doesn’t seem like there is anything from a modding perspective that would prevent the latter game from replicating this process.
Who is the best person to contact for adding this game to Horizon? I’m willing to pay good money for this if it can be done. This seems like it would be much easier to do compared to something like FM4. I’d be happy to share my save file if that would help. I have everything else in the game unlocked.