I remember playing Silent Hill for the first time on the PlayStation and it reminded me of the Elementary School which is the earlier portion of the game. There so many small and creepy moments that ramps up the tension. It gets even scarier when the you enter the twisted version of the school.
Mass Effect 3 Omega DLC initial encounter with the Cerberus Reaper Adjutants
The whole place is dark and littered with bodies, those things look creepy, and their attacks are painful too
Sure you may keep a good distance but even if they close that distance the littlest of bits, they have a jumping pounce melee attack that for some reason is able to chain into an instakilling combo you cant escape from. If you keep a distance they shoot a blackhole of biotic energy that has a damage over time effect and is quite painful
That and the meeting David in Overlord DLC from ME2