Funnily enough, when playing games that involve underwater sections, it's the fear of drowning rather than the potential monsters of the deep that scares me more. So games where you can breathe underwater don't do much, even with the freakiest of beasts.
The first game that gave me crazy jump scares was Doom 3 back in the day, until you kind of get accustomed to it and then it's more like, bring 'em to me, I'll make a mess of the next bastard who tries that.
After that, it's more anticipation of things rather than straight-out horror, for example I found the suspenseful bits of earlier Resident Evil games way more scarier than the crazy mutated bosses. And Condemned does it really well too, especially when going around with that small UV light footprint scanner thing. And opening locker doors searching for things. Or when supernatural type shit happens (those manikins were NOT standing there just a second ago!) Darkness, obscured vision and good creepy sound effects puts me over the edge, that's when it actually takes a bit of guts to proceed and I love those moments.
The first game that gave me crazy jump scares was Doom 3 back in the day, until you kind of get accustomed to it and then it's more like, bring 'em to me, I'll make a mess of the next bastard who tries that.
After that, it's more anticipation of things rather than straight-out horror, for example I found the suspenseful bits of earlier Resident Evil games way more scarier than the crazy mutated bosses. And Condemned does it really well too, especially when going around with that small UV light footprint scanner thing. And opening locker doors searching for things. Or when supernatural type shit happens (those manikins were NOT standing there just a second ago!) Darkness, obscured vision and good creepy sound effects puts me over the edge, that's when it actually takes a bit of guts to proceed and I love those moments.