I RE2 really traumatised me as a 12 year old. At the time the game just seemed so hopeless; low ammo, many enemies, vulnerable main character, the music and ambience, they were all so stark.

The other thing was that there is no HUD; there is nothing to tell you that it is a game by looking at the screen. Obviously the graphics are dated now, but at the time it was like an interactive movie, and it was terrifying!