Theresia

Theresia is a psychological horror visual novel adventure game from a first-person perspective, consisting of two stories, each sharing a common background: an unnamed country, presumably under strict martial law by the time the game takes place, is engaged in a fierce and bloody war with an unspecified opposing nation. No further details are provided: the player is then thrust directly into the role of Leanne, the protagonist of the first half of the story.

(Source of Description - Wikipedia; 'Theresia')