Ao Oni (青鬼) is a Japanese survival horror game in which the player must solve puzzles and explore while avoiding The Oni.
Ao Oni translates to Blue Demon. Story: 3 boys and 1 girl enter a mansion which is rumored to have a monster in it.
Hiroshi, the protagonist, denies monsters existing and exclaims that it is "scientifically impossible". Hiroshi goes to explore a sound and finds out that it was just a plate shattered on the ground. Hiroshi returns to the room to see his friends missing. He sets out exploring to find them.
Ao Oni is totally rad man, it scared me for days!