No joke: Knock-Knock out now on Steam, 15 percent off

Survival-meets-creepy-house-exploration game Knock-Knock is now available on Steam. The game is 15 percent off ($8.49) until October 11.

Knock-Knock has players guiding the Lodger through a house in the middle of the woods, avoiding intruding creatures while hunting for an unknown lost item. Developer Ice-Pick Lodge says the goal of each day in the adventure game is to stay sane while lasting until dawn, fixing gaps in the house to prevent the nightmarish creatures from invading.

This article was originally published on Joystiq.