10 Most Important Video Game Easter Eggs Of ALL TIME

10. Castlevania: Symphony Of The Night - Listen To The Music

Up there as one of the most memorable Easter eggs of the '90s, Konami got oh-so creative with this musical number. Back when physical media reigned supreme and people still used an antiquated form of audio storage called compact discs, Symphony of the Night's most well-hidden secret had some hefty hardware requirements for the time.

To access a bonus track — it never received an official name beyond "Alucard #2" — owners of the OG PlayStation Metroidvania title needed to insert the game disc into any device capable of reading (and playing) music and skip to track two. Upon thumbing the play button, none other than Alucard's voice would spill from the speakers, recognising the incorrect use of a PS1 disc and stressing that it be returned to its rightful home in your console. Ignoring his protestations for long enough would eventually yield a reward in the form of a remixed Castlevania theme.

Because of course it would happen, the discovery of Symphony of the Night's Easter egg would prompt PS1 owners the world over to fruitlessly try their luck with every game they owned, hoping for similar results.