Angry Cat Studios announced their "Steamjunk" RPG Jet Rat:

Short Description

Jet Rat is a "steamjunk," story-driven action-platformer-RPG set in a unique, rattastic world full of mischief, heroism and secrets, in which you create your very own rat to embark on a journey to save Ratlantic City from the evil of its corrupt mayor, Hector LeBlanc the Third.

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Tagline

"A mechanic falls. A hero rises. A legacy continues."

Main features

• Physics-based 2D puzzle-platformer
• Cartoonish, hand-drawn "steamjunk" art style
• Role-playing elements: character attributes, inventory system, skills, crafting
• Fully customizable player character, interactive itemization
• Original story with memorable NPCs, main and side quests, lots of twists
• Jetpack! Yes! Rats can fly! (Mind you, gravity still applies...)
• Humor and drama. Take your pick.

A prototype demo is available.