The Imperial Cruiser was a massive battle ship under the command of the Eighth Empire. It was used as a base of operations for Prince Eugene during his short occupation of the Northrop Republic. It featured several massive gun turrets and could carry an entire legion of Pkw. III tanks in it's hold.
When Linear Cannon was kidnapped by Eugene, she was taken aboard The Imperial Cruiser. Mag Launcher and his companions flew their plane, The Sea Otter, in pursuit of this ship. These adventurers crash landed on the deck and began their attack within.
During this assault, the Imperial Cruiser took massive damage after Mag kicked a grenade into the pipes in the engine room, resulting in the destruction of the entire ship a short time later. Chain Gun seemed to take the most delight out of this turn of events.