Y-85 Titan dropship/Legends

The Walker Dropship or the Y-85 Titan dropship was an important vehicle used to deploy AT-ATs and AT-STs onto planetary surfaces. It was manufactured by Incom Corporation, the same company which manufactured both the ARC-170 starfighters and X-wing starfighters. It features a standard cockpit module and can accommodate four AT-ATs in addition to four AT-STs. The Walker Dropship is available on most Imperial ships. It also had two forward twin laser cannons for defence. The Walker Dropship can also be used to deployed AT-AT Swimmers and TIE Fighter Boats straight into any body of water.

Though it was never seen in The Empire Strikes Back, the Y-85 is credited with having delivered walkers to the Hoth surface before the assault on Echo Base, according to the Inside the Worlds of The Original Trilogy factbook.

AT Barge
This dropship was similar in shape to the Y-85, but smaller and dark blue in color. It could carry only two AT-ATs.