Visit the 39 Days to Mars Store Page

The Additional Victorian Adventure update contains a variety of new puzzles devised to stretch your brain and your co-ordination in new, fun, and unusual ways. The content slips seamlessly into the existing story, making the ill-fated 19th century adventure a little longer and a little more puzzling.

So grab your walking sticks and join or revisit Sir Albert Wickes and The Right Honourable Clarence Baxter in this co-operative steampunk puzzle-adventure. Work together on the problems that arise to keep the two hapless engineers alive; prevent the ship from falling apart around them; and successfully pilot the HMS Fearful on its maiden voyage to Mars.

39 Days to Mars and the additional content is available for Windows, MacOS, and Linux.
I hope that you enjoy the adventure!