AM2R, short for Another Metroid 2 Remake, is a fan made remake of Metroid II: Return of Samus that was released in 2016 after years in development. Its tougher encounters, including The Horde sequence, became notorious among players who replayed the game and learned to fear their audio cues as much as the enemies themselves. Clips of the monster appears cue now circulate outside the game as a shorthand for retro gaming trauma, used whenever a creator wants an audience to feel a sudden encounter starting.