Monster Hunter Tri was first announced for PS3, but was canceled. It's also one of two installments that have swimming and underwater combat. When asked about why they went Wii, they said
Monster Hunter Frontier G Soaring Its Way To PlayStation 3 And Wii U - Siliconera
Monster Hunter Tri PlayStation 3 Box Art Cover by Joeseye
Monster Hunter Frontier G Beginners Package PS3 Capcom Sony PlayStation 3 Japan 4976219051682 | eBay