EarthBound · SNES · 1994 · Hidden Feature
Effect: Sets the player character's name to Ness, which unlocks special dialogue acknowledgments and is required for certain story sequences to reference the name correctly.
EarthBound's naming sequence at the start of the game was itself a layered design: the psychic Buzz Buzz tells the player their destiny, and the default name "Ness" was no accident — it is a nod to Nintendo's hardware, widely read as an anagram of SNES and a phonetic play on NES. Players could rename every character, but most kept the default, and the name became so culturally embedded that when Ness appeared as a fighter in Super Smash Bros. in 1999, most players had no memory of ever having named their character differently. The "cheat" is less a code than a deliberate designer Easter egg built into the game's opening by creator Shigesato Itoi.