In Night Security, players step into the role of a security guard tasked with patrolling a building floor by floor. Your nightly duties include locking rooms, turning off running toilets, and checking fire alarms. Once all tasks on a floor are completed, you ride the elevator up to continue your shift.

Unlike some of Chilla's Art's more recent titles — which often feature complex puzzles, repetitive routines, and a heavy focus on lore or supporting characters — Night Security takes a more streamlined approach. It strips away the excess, focusing instead on atmosphere and pure psychological tension. The result is a more direct, unsettling experience that leans into fear over frustration.

The game draws inspiration from real-life accounts of night security guards in Japan who have reported eerie and unexplained occurrences during their shifts. The dread builds effectively, creeping in with every new floor and uncanny encounter. It's a short but well-crafted horror experience — perfect for a summer night and fitting its price range, though sales are definitely welcomed as well.