As the planet warms, there's going to be a rise in the sea's level. This will fundamentally change many parts of the globe. That's what's happened in Blue Planet. This post-apocalyptic RPG is getting a new edition that's up on Kickstarter now.
From the campaign:
Blue Planet is a compelling RPG journey into humanity’s precarious future on a distant waterworld where political unrest and a hungry alien ecology threaten the nascent colony effort. A planet where GEO marshals struggle to maintain peace, Incorporate mercenaries wage amphibious proxy wars, and native insurgents fight for their adopted world. A frontier where human desperation and corporate greed ravage an uncanny ecology, threatening to plunge humanity into a war of survival with an ancient, alien legacy.
Though the original Blue Planet predates many of these titles, the setting is evoked by the movies Avatar, Blade Runner and Outland, the television series The Expanse, Firefly and Earth II and the books Legacy of Heorot, Songs of Distant Earth and the Mars Trilogy. A reviewer once gave a glib but accurate elevator pitch for Blue Planet as "Space marshal Cowboy and his cybernetic dolphin sidekick fight eco-crimes in alien Hawaii."
The campaign's making its way to 3x funded with 14 days to go.