Rust gets rusty boat building, so you can sail in search of ghost ships, floating cities and tropical islands
Rust, the survival game also the world's foremost simulator of rock-chucking battles between naked people, has gotten a naval update adding in the ability to cobble together your own watercraft and sail the high seas. Those seas have plenty to discover and point your cannons at too, especially the "high risk, high reward, and intentionally unforgiving" deep sea region.