Nightmare Fuel / Toontown Online

• Imagine living in a world where random robots started to come and destroy your way of life entirely.
• The various music for Bossbot HQ and the theme of it. Going to Bossbot HQ late at night when it's dark out is enough to give someone the chills (especially if you're the only person there).
• Skelecogs. Not only do they look quite eerie, but their distorted voices that sound much more robotic than the normal cog voice alone is probably enough to give the younger players of the game nightmares.
• The 4 Cog HQs. The Sellbot HQ in Daisy Gardens is presented as a huge factory in the middle of a polluted wasteland. The Cashbot HQ in Donald's Dreamland resembles a humongous bank/train station with trains that can crush your toon. The Lawbot HQ in the Brrrgh resembles a dark version of a law court, ominously quiet with a seemingly empty New York-esque city in the background. But the scariest is probably the Bossbot HQ just behind Acorn Acres, a dark, foreboding castle with chilling music.
• Bossbot HQ's design is also unusual in that it's located in Chip n' Dale's Acorn Acres, but with absolutely no warning signpost or clear route like the others have. You can stroll into the Minigolf Course, and right there is a grey stone gate with two towers, leading straight to the HQ, with the cheery course music playing all the while.
• The Series 3 Downsizer trading card◊, which depicts him painfully shrinking a captive Toon while the Toon's friend watches in horror.
• To some players, the complete silence and isolation of your Toon Estate (the only area of the game with no music) comes across as more chilling than serene. The unoccupied houses take the creepy "liminal space" vibe even further, with their bland white walls and complete lack of windows.

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