Sunless Sea is a good game and Zubmariner brings a solid amount more of that goodness into the fold… But for anyone who has played the game somewhat extensively, I would proceed with caution because for me, a lack of anything really new was the straw that broke the proverbial camel’s back.
Surviving Mars, is competent but dried up fairly quickly. The systems in place work well and it accomplishes all it wants to do effectively. It has a good natural difficulty and good variation between plays. For those who are comforted by grid lined paper, this is probably a cathartic managerial experience. I am not in that group however. Like the planet itself, the whole experience felt a bit one note and bare. To me, there needed to be something else, another angle or facet to the game to give it the life that it desperately needed.