Resident Evil HD
Capcom helped define survival horror with the first Resident Evil in 1996. Inventory management and ammo conservation added a layer of tension that only made your cautious meanderings through the halls of the Spencer Estate that much scarier.
The gorgeous 2002 update (and 2015 remaster) not only added new levels of detail, atmosphere, and sophistication to the already remarkable design of the original, but it also threw some sinister curve balls. The newly added Crimson Head zombies and the nightmarish tale of Lisa Trevor help make for one of the most important and terrifying horror games around.