List of blimps in the Project Series

A blimp, or non-rigid airship, is an airship (dirigible)  without an internal structural framework or a keel. Unlike semi-rigid and rigid airships (e.g. Zeppelins), blimps rely on the pressure of the lifting gas (usually helium, rather than hydrogen) inside the envelope and the strength of the envelope itself to maintain their shape.

Blimps play a major role in the Project Universe and are mainly used by the villains.

Project Batman 2
The Joker uses a blimp in PB2 to move around the world and Gotham City without fear of being hunted by the police or Batman. However, Batman was able to grapple onto his blimp and take down all of his thugs such as The Gangster Lord after breaking out of the rope that tied him up after getting caught.

Project Batman 5: The Shadow of Evil
Alfred uses a blimp in PB5 to lure Batman into so he can kill him, Robin, himself, and burn Wayne Mandor to the ground by crashing the blimp into it (he succeeded in two of those). Batman rescued Robin in time and jumped out of the blimp right as it crashed into Wayne Manor, killing Alfred in the process.