No. Capcom did not release any additional story episodes for Resident Evil Revelations on Xbox 360. All DLC is limited to Raid Mode content (weapons, custom parts, and playable characters).
Modified consoles require homebrew software to authorize unsigned or transferred content. If your DLC shows as "corrupted" or does not appear in-game, use one of these two methods. Method A: XM360 (Recommended) Launch on your Xbox 360 console. Select Rescan All . Go to the DLC menu. Resident Evil Revelations -Jtag RGH DLC-
To successfully install and run DLC on a modified Xbox 360, you need the following tools and file structures: Resident Evil Revelations -Jtag RGH DLC-