Use a tool like to "Unlock" the DLC if it appears with a closed lock icon, which prevents it from showing up in-game. For Retail (Unmodified) Consoles :
Welcome back to the digital excavation. In Part 1 of our deep dive into the Xbox 360 DLC Archive, we explored the early days of Xbox Live, the rise of the Xbox Live Arcade, and the first wave of "endangered" content—from Castle Crashers weapon packs to Rock Band tracks that vanished overnight. xbox 360 dlc archive part 2