Here's a video from 1995 showing the game "DeathWatch" for the Jaguar. The game was a 2D run and gun platformer developed by British game developer Data Design InterActive. It was announced and demoed at E3 1995, the first E3, but it was never released. Atari shifted focus to 3D games on the Jaguar after the E3 event. The game looked really good, so it is unfortunate it is a lost big of Atari history.