The 'Luna Game' refers to a series of infamous creepypasta platformer games released starting in 2011, featuring Princess Luna from My Little Pony. These games famously masquerade as innocent fan projects before transitioning into surreal horror and jump-scares, often concluding with the ominous phrase 'The End is Neigh.' The meme represents the darker side of internet fandoms and the 'bait-and-switch' horror subculture of the early 2010s. Today, it is used to evoke nostalgia for classic internet horror or to provide a spooky twist to otherwise innocent situations, leveraging the clever pun on the word 'nigh' to fit the equine theme of the source material.